Flash Memory Selection

• “PSEN low to valid instruction in” (t_pliv = 2 t_clcl - 25ns): The flash output enable to output delay time, t_glqv, must be faster than the DS80C400/DS80C410/DS80C411 t_pliv. For example, AM29LV081B-70 has a t_glqv of 30ns and a 30MHz DS80C400 (t_clcl = 33.3ns) has a t_pliv of 41.6ns.
• “Address to valid data in” (t_aviv1 = 3 t_clcl - 19ns): The flash access time, t_avav, must be faster than this number. For example, when running at 25MHz, t_clcl is 40ns and t_avav must therefore be smaller than 101ns.

;****************************************************************************
;* Copyright (C) 2013 Maxim Integrated, All Rights Reserved.
;*
;* Permission is hereby granted, free of charge, to any person obtaining a
;* copy of this software and associated documentation files (the "Software"),
;* to deal in the Software without restriction, including without limitation
;* the rights to use, copy, modify, merge, publish, distribute, sublicense,
;* and/or sell copies of the Software, and to permit persons to whom the
;* Software is furnished to do so, subject to the following conditions:
;*
;* The above copyright notice and this permission notice shall be included
;* in all copies or substantial portions of the Software.
;*
;* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
;* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
;* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
;* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
;* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
;* ARISING FROM, OUT OF, OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
;* OTHER DEALINGS IN THE SOFTWARE.
;*
;* Except as contained in this notice, the name of Maxim Integrated
;* shall not be used except as stated in the Maxim Integrated
;* Branding Policy.
;****************************************************************************
;
; This program demonstrates how to erase a flash memory chip that is not
; supported by the ROM loader of the networked microcontrollers.
;
; To build this program, run
;    macro chiperase.asm
;    a390 -d -l chiperase.mpp
;
; To execute, load into SRAM and use loader commands 'B0', 'X0'.
;
; Note: When using MTK to load this code, be sure to disable the "Clear Heap"
; option.
;

; The flash memory we want to erase is connected to CE2\, or address 400000h,
; since the ROM uses 2MB per chip enable.

FLASH_ADDRESS EQU 400000h

; Different flash memories use different addresses to "tickle" flash programming/
; erase operation.

; Erase ST M29W040
; FLASH_TICKLE0 EQU (FLASH_ADDRESS or 555h)
; FLASH_TICKLE1 EQU (FLASH_ADDRESS or 2aah)

; Erase AM29LV200BT
FLASH_TICKLE0 EQU (FLASH_ADDRESS or 0aaah)
FLASH_TICKLE1 EQU (FLASH_ADDRESS or 555h)


        org 000000h

start:
        ; The ROM enables 24-bit mode and disables interrupts.
        ; No other initialization is necessary.

        ; Start flash chip erase

        ; 1st Cycle
        mov dptr, #FLASH_TICKLE0
        mov a, #0aah
        movx @dptr, a

        ; 2nd Cycle
        mov dptr, #FLASH_TICKLE1
        mov a, #55h
        movx @dptr, a
 
        ; 3rd Cycle
        mov dptr, #FLASH_TICKLE0
        mov a, #80h
        movx @dptr, a

        ; 4th Cycle
        mov dptr, #FLASH_TICKLE0
        mov a, #0aah
        movx @dptr, a

        ; 5th Cycle
        mov dptr, #FLASH_TICKLE1
        mov a, #55h
        movx @dptr, a

        ; 6th Cycle
        mov dptr, #FLASH_TICKLE0
        mov a, #10h
        movx @dptr, a

        ; Wait for operation to complete
        mov dptr, #FLASH_ADDRESS
wait:
        movx a, @dptr
        cjne a, #0ffh, wait

        ; Reset
        mov dptr, #FLASH_ADDRESS
        mov a, #0f0h
        movx @dptr, a

        ; Print success message
        mov a, #'D'
        acall printchar
        mov a, #'O'
        acall printchar
        mov a, #'N'
        acall printchar
        mov a, #'E'
        acall printchar

	; Done!
        sjmp $


        ; Serial port 0 is initialized by the loader. Printing
        ; a character is therefore trivial.
tix bit scon.1
printchar:
        jnb  tix, $
        clr tix
        mov sbuf, a
        jnb  tix, $
        ret

        end

;****************************************************************************
;* Copyright (C) 2013 Maxim Integrated, All Rights Reserved.
;*
;* Permission is hereby granted, free of charge, to any person obtaining a
;* copy of this software and associated documentation files (the "Software"),
;* to deal in the Software without restriction, including without limitation
;* the rights to use, copy, modify, merge, publish, distribute, sublicense,
;* and/or sell copies of the Software, and to permit persons to whom the
;* Software is furnished to do so, subject to the following conditions:
;*
;* The above copyright notice and this permission notice shall be included
;* in all copies or substantial portions of the Software.
;*
;* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
;* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
;* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
;* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
;* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
;* ARISING FROM, OUT OF, OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
;* OTHER DEALINGS IN THE SOFTWARE.
;*
;* Except as contained in this notice, the name of Maxim Integrated
;* shall not be used except as stated in the Maxim Integrated
;* Branding Policy.
;****************************************************************************
;
; This program demonstrates how to erase a flash memory chip that is not
; supported by the ROM loader of the networked microcontrollers.
;
; To build this program, run
;    macro flashprogram.asm
;    a390 -d -l flashprogram.mpp
;
; To execute, first load the data you wish to program into SRAM memory in
; bank 1 (010000h - 01ffffh). Then, load this code into SRAM and use
; the loader commands 'B0', 'X100'.
;
; Note: When using MTK to load this code, be sure to disable the "Clear Heap"
; option.
;

; The flash memory we want to program is connected to CE2\, or address 400000h,
; since the ROM uses 2MB per chip enable.

FLASH_ADDRESS EQU 400000h

; Different flash memories use different addresses to "tickle" flash programming/
; erase operation.

; Byte Program AM29LV200BT
FLASH_TICKLE0 EQU (FLASH_ADDRESS or 0aaah)
FLASH_TICKLE1 EQU (FLASH_ADDRESS or 555h)

; Address of programming buffer in SRAM
PROG_BUFFER EQU 010000h

; We want to program a whole 64KB block
PROG_SIZE EQU 10000h

; This example program uses three datapointers
dps equ 086h

        org 000100h

start:
        ; The ROM enables 24-bit mode and disables interrupts.
        ; No other initialization is necessary.

        ; Make sure r2 is in register bank 0
        mov psw, #0

        ; Number of bytes to program
        mov r1, #high(PROG_SIZE)
        mov r0, #low(PROG_SIZE)

        ; Source
        mov dps, #1
        mov dptr, #PROG_BUFFER

        ; Destination
        mov dps, #8
        mov dptr, #FLASH_ADDRESS

loop:
        ; Start flash chip program for this byte

        ; Get source byte
        mov dps, #1
        movx a, @dptr
        inc dptr

        ; Save byte we wish to program
        mov r2, a

        ; No need to write the same byte again
        ; (also prevents writing of 0ffh)
        mov dps, #8
        movx a, @dptr
        xrl a, r2
        jz next

        ; Select dptr0
        mov dps, #0

        ; 1st Cycle
        mov dptr, #FLASH_TICKLE0
        mov a, #0aah
        movx @dptr, a

        ; 2nd Cycle
        mov dptr, #FLASH_TICKLE1
        mov a, #55h
        movx @dptr, a
 
        ; 3rd Cycle
        mov dptr, #FLASH_TICKLE0
        mov a, #0a0h
        movx @dptr, a

        ; 4th Cycle: Put destination byte
        mov dps, #8
        mov a, r2
        movx @dptr, a

        ; Wait for operation to complete
wait:
        movx a, @dptr
        cjne a, 2, wait

next:
        mov dps, #8
        inc dptr

        djnz r0, loop

        ; Display progress indicator
        mov a, #'.'
        acall printchar

        djnz r1, loop

        ; Reset
        mov dptr, #FLASH_ADDRESS
        mov a, #0f0h
        movx @dptr, a

        ; Print success message
        mov a, #13
        acall printchar
        mov a, #10
        acall printchar
        mov a, #'D'
        acall printchar
        mov a, #'O'
        acall printchar
        mov a, #'N'
        acall printchar
        mov a, #'E'
        acall printchar

        ; Done!
        sjmp $


        ; Serial port 0 is initialized by the loader. Printing
        ; a character is therefore trivial.
tix bit scon.1
printchar:
        jnb  tix, $
        clr tix
        mov sbuf, a
        jnb  tix, $
        ret

        end

/* ---------------------------------------------------------------------------
 *  Copyright (C) 2013 Maxim Integrated, All Rights Reserved.
 * 
 *  Permission is hereby granted, free of charge, to any person obtaining a
 *  copy of this software and associated documentation files (the "Software"),
 *  to deal in the Software without restriction, including without limitation
 *  the rights to use, copy, modify, merge, publish, distribute, sublicense,
 *  and/or sell copies of the Software, and to permit persons to whom the
 *  Software is furnished to do so, subject to the following conditions:
 * 
 *  The above copyright notice and this permission notice shall be included
 *  in all copies or substantial portions of the Software.
 * 
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 *  OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 *  IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
 *  OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 *  ARISING FROM, OUT OF, OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 *  OTHER DEALINGS IN THE SOFTWARE.
 * 
 *  Except as contained in this notice, the name of Maxim Integrated
 *  shall not be used except as stated in the Maxim Integrated
 *  Branding Policy.
 * ---------------------------------------------------------------------------
 */

/*
 * Identify - Tries to Identify Flash Memory Make/Model.
 * Run from bank 20 (using loader commands B20, X)
 */

#include <stdio.h>
#include <reg400.h>

void main()
{
  unsigned char vendor, device, ce;

  puts("DS80C400/DS80C410/DS80C411 Flash Memory Identification");

  do {

    printf("\nIdentify flash at which chip enable? ");
    do {
      putchar(ce = _getkey());
      if ((ce < '0') || (ce > '7'))
        printf(" 0-7> ");
    } while ((ce < '0') || (ce > '7'));
    puts("\n");

    ce -= '0';
    ce <<= 5; // 2MB per chip enable

    AP = ce;
#pragma asm
    /* Tickle Flash Memory */
    mov dptr, #0x5555
    mov dpx, ap
    mov a, #0xaa
    movx @dptr, a

    mov dptr, #0xaaaa
    mov dpx, ap
    mov a, #0x55
    movx @dptr, a

    /* Read ID Command */
    mov dptr, #0x5555
    mov dpx, ap
    mov a, #0x90
    movx @dptr, a

    /* Read Manufacturer ID */
    mov dptr, #0
    mov dpx, ap
    movx a, @dptr
#pragma endasm
    vendor = ACC;

#pragma asm
    /* Reset Flash */
    mov dptr, #0
    mov dpx, ap
    mov a, #0xf0
    movx @dptr, a
    mov a, #0xff
    movx @dptr, a
#pragma endasm

#pragma asm
    /* Tickle Flash Memory */
    mov dptr, #0x5555
    mov dpx, ap
    mov a, #0xaa
    movx @dptr, a

    mov dptr, #0xaaaa
    mov dpx, ap
    mov a, #0x55
    movx @dptr, a

    /* Read ID Command */
    mov dptr, #0x5555
    mov dpx, ap
    mov a, #0x90
    movx @dptr, a

    /* Read Manufacturer ID */
    mov dptr, #0x01
    mov dpx, ap
    movx a, @dptr
#pragma endasm
    device = ACC;

#pragma asm
    /* Reset Flash */
    mov dptr, #0
    mov dpx, ap
    mov a, #0xf0
    movx @dptr, a
    mov a, #0xff
    movx @dptr, a
#pragma endasm

    printf("Flash memory at CE%bu: Vendor ID %02bX, Device ID %02bX.\n --> ", ce >> 5, vendor, device);

    switch (vendor) {
      case 0x01: printf("Spansion AM");
        switch (device) {
          case 0x37: puts("29LV008 Top Boot"); break;
          case 0x38: puts("29LV081"); break;
          case 0x3b: puts("29LV200 Top Boot"); break;
          case 0x3e: puts("29LV008 Bottom Boot"); break;
          case 0x49: puts("29LV160 Bottom Boot"); break;
          case 0x4c: puts("29LV116 Bottom Boot"); break;
          case 0x4f: puts("29LV040"); break;
          case 0x5b: puts("29LV800 Bottom Boot"); break;
          case 0xa3: puts("29LV033"); break;
          case 0xb5: puts("29LV004 Top Boot"); break;
          case 0xb6: puts("29LV004 Bottom Boot"); break;
          case 0xb9: puts("29LV400 Top Boot"); break;
          case 0xba: puts("29LV400 Bottom Boot"); break;
          case 0xbf: puts("29LV200 Bottom Boot"); break;
          case 0xc4: puts("29LV160 Top Boot"); break;
          case 0xc7: puts("29LV116 Top Boot"); break;
          case 0xc8: puts("29LV017"); break;
          case 0xda: puts("29LV800 Top Boot"); break;
          case 0xf6: puts("29LV320 Top Boot"); break;
          case 0xf9: puts("29LV320 Bottom Boot"); break;
          default:   puts(" ????"); break;
        }
      break;
      case 0x1f: printf("Atmel AT");
        switch (device) {
          case 0x21: puts("49BV/LV008 T"); break;
          case 0x22: puts("49BV/LV008"); break;
          case 0xeb: puts("49LL080"); break;
          default:   puts(" ????"); break;
        }
      break;
      case 0x20: printf("ST M");
        switch (device) {
          case 0x5b: puts("29W800 Bottom Boot"); break;
          case 0xd2: puts("29W008 Top Boot"); break;
          case 0xd7: puts("29W800 Top Boot"); break;
          case 0xdc: puts("29W008 Bottom Boot"); break;
          case 0xe3: puts("29W040"); break;
          case 0xea: puts("29W004 Top Boot"); break;
          case 0xeb: puts("29W004 Bottom Boot"); break;
          default:   puts(" ????"); break;
        }
      break;
      case 0x89: printf("Intel or Sharp LH or "); // fall through
      case 0x2c: printf("Micron MT");
        switch (device) {
          case 0x16: puts("28F320J3"); break;
          case 0x70: puts("28F004B3/28F400B3 Top Boot"); break;
          case 0x71: puts("28F004B3/28F400B3 Bottom Boot"); break;
          case 0x9c: puts("28F008B3/28F800B3 Top Boot"); break;
          case 0x9d: puts("28F008B3/28F800B3 Bottom Boot"); break;
          case 0xaa: puts("28F016SC"); break;
          default:   puts(" ????"); break;
        }
      break;
      case 0xbf: printf("SST SST");
        switch (device) {
          case 0xc8: puts("39VF1681"); break;
          case 0xc9: puts("39VF1682"); break;
          case 0xd4: puts("39LF/VF512"); break;
          case 0xd5: puts("39LF/VF010"); break;
          case 0xd6: puts("39LF/VF020"); break;
          case 0xd7: puts("39LF/VF040"); break;
          case 0xd8: puts("39LF/VF080"); break;
          default:   puts(" ????"); break;
        }
      break;
      case 0x02:
      case 0xc2: printf("Macronix MX");
        switch (device) {
          case 0x38: puts("29LV081"); break;
          case 0xa3: puts("29LV033"); break;
          case 0xc8: puts("29LV017"); break;
          default:   puts(" ????"); break;
        }
      break;
      case 0xda: printf("Winbond W");
        switch (device) {
          case 0xd6: puts("39L040"); break;
          default:   puts(" ????"); break;
        }
      break;
      default:   puts("Unknown vendor/unknown device");
      break;
    }
  } while (1);
}