AN205384
F²MC - 8FX Family, MB95200H/210H Series, Flash Operation
This application note describes flash operation in MB95200H/210H Series. This application note describes the
programming algorithm and explains a complete project which includes flash.asm, flash erase C code flash write C
code and main.c.).
Contents
1
2
3
1
Introduction ..................................................................1
Programming Algorithm ...............................................2
2.1 Overview .............................................................2
2.2 Features of Flash Memory ..................................2
2.3 Sector Configuration ...........................................2
2.4 Register of Flash Memory ...................................2
2.5 Starting Flash Memory Automatic Algorithm .......3
Source Codes ..............................................................4
3.1 How to Compile the RAM Code ..........................4
3.2 Flashing Routines ...............................................8
3.3 Sub Functions ................................................... 13
3.4 How to Use the Programming Functions .......... 14
4 Notes on Flash Operation.......................................... 15
4.1 Reprogram the NVR after Erasing .................... 15
4.2 High Voltage Supply on RST PIN ..................... 15
5 Appendix ................................................................... 16
5.1 Sample Code .................................................... 16
6 Additional Information ................................................ 23
Document History............................................................ 24
Introduction
This application note describes flash operation in MB95200H/210H Series.
This application note describes the programming algorithm and explains a complete project which includes flash.asm,
flash erase C code flash write C code and main.c.
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F²MC - 8FX Family, MB95200H/210H Series, Flash Operation
2
Programming Algorithm
This chapter introduces the algorithm of Flash Operation.
2.1
Overview
If a user program is running in the flash memory, the flash memory cannot be erased or programmed simultaneously.
The only way for the user is to store flashing routines into the RAM area, so that the CPU executes instructions in this
memory area and the flash can be erased and programmed.
2.2
2.3
Features of Flash Memory
Sector configuration: 4KB x 8 bits / 8KB x 8 bits / 16KB x 8 bits
Automatic program algorithm (Embedded Algorithm)
Detecting the completion of programming/erasing using the data polling or toggle bit function
Detecting the completion of programming/erasing by CPU interrupts
Compatible with JEDEC standard commands
Erase/program cycle (minimum): 100,000 times
Sector Configuration
Figure 1 shows the sector configuration of the 32/64/128-KBIT flash memory. The upper and lower addresses of each
sector are given in the figure.
Figure 1. Sector Configuration of 32/64/128-KBIT Flash Memory
2.4
Register of Flash Memory
Figure 2 shows the register of flash memory. For details please refer to Chapter 20 of the MB95200H/210H Series
hardware manual.
Figure 2. Register of Flash Memory
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2.5
Starting Flash Memory Automatic Algorithm
There are three types of commands that invoke the flash memory automatic algorithm: read/reset, write (program)
and chip-erase. Figure 3 lists commands used in programming/erasing flash memory.
Figure 3. Command Sequence
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3
Source Codes
Sample codes for Flash Operation
3.1
3.1.1
How to Compile the RAM Code
O ve r v i e w
This sample project demonstrates the flash operation. The assembly flash.asm routine is executed in the RAM; it is
permanently located in the RAM during run-time. The assembly flash.asm routine is stored in the flash memory, but
its addresses need to be compiled and linked to the RAM, so that it can run correctly when it is copied from the flash
memory to the RAM. To get permanent RAMCODE working, four steps have to be done.
1.
Define code in RAMCODE section
2.
Link Code for RAM and ROM
3.
Copy code from the ROM to the RAM in start-up file
4.
Jump to the RAM to execute the RAMCODE
The four steps will be explained one by one below.
3.1.2
Define Code in RAMCODE Section
RAMCODE is just a section name, which can be named by the user. Use the same name when setting the section in
the Softune Workbench project environment. More will be described in 3.1.3
To define code in RAMCODE Section and in Assembly language modules, the following statement can be used:
.SECTION RAMCODE, CODE
This line forces to locate all Assembly code of flash.asm to RAMCODE. A separate module (file with extension 'asm')
should be used for RAMCODE functions only.
3.1.3
Link Code for RAM and ROM
The linker of the Softune Workbench provides a dedicated mechanism to link code for RAM and ROM, which address
of every instruction of the program in RAMCODE section are resolved for RAM and the belonging code data are
stored in ROM.
The same settings in the Workbench have to be made in project which can be done through 4 steps as shown below.
Step1: Select Setup Project in Project menu.
Figure 4. Select Setup Project in Project
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F²MC - 8FX Family, MB95200H/210H Series, Flash Operation
Step2: Select Disposition/Connection from Category in Setup Project window.
Figure 5. Select Disposition/Connection in Setup Project
Step 3: Select Set Section in Disposition/Connection
Figure 6. Select Set Section in Disposition/Connection
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Step 4: RAM Setting in Setup Section.
The linker is informed of a code section to be located in RAM, after setting RAMCODE/Code in _INRAM01.
Figure 7. RAM Setting in Setup Section
Step 5: ROM Setting in Setup Section
The linker will recognize the wish to store the initialized data in ROM, after setting a "@" section with same name "
RAMCODE" and setting @RAMCODE/Const in _INROM01.
Figure 8. ROM Setting in Setup Section
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3.1.4
C o p y C o d e f r o m R O M t o R AM
In order to be able to handle these sections, the linker provides generic labels for the start addresses of the sections
in the RAM and the ROM.
_RAM_ + section name
_ROM_ + section name
As the section is named "RAMCODE" in this example, labels with RAMCODE appended to are generated:
_RAM_RAMCODE
_ROM_RAMCODE
These labels have to be imported in the startup file, before the code is copied from the ROM to the RAM.
For copying code from ROM to RAM, four points have to be added in current startup file.
These labels are imported by the startup file when point 1and point 2 are added as below.
;-----------------------------------------------------------------------; external declaration of symbols
;-----------------------------------------------------------------------.IMPORT
_RAM_RAMCODE
; point 1 added here
.IMPORT
_ROM_RAMCODE
; point 2 added here
The startup file adds a descriptor of the sections in ROM and RAM and their size. Then startup file is prepared to
copy a section with name "RAMCODE", when point 3 is added.
;-----------------------------------------------------------------------; definition to start address of data, const and code section
;-----------------------------------------------------------------------.SECTION
RAMCODE, CODE, ALIGN=1 ; point 3 added here
The code in RAMCODE section is copied from the ROM to the RAM when instructions are implemented as shown
below.
;-----------------------------------------------------------------------; copy initial value *CONST(ROM) section to *INIT(RAM) section
;-----------------------------------------------------------------------ICOPY
_ROM_RAMCODE, _RAM_RAMCODE, RAMCODE; point 4 added here
ICOPY src_addr, dest_addr, src_section is a macro, which can copy initial value from _ROM_RAMCODE (ROM)
section to _RAM__RAMCODE (RAM) section. The detailed code of ICOPY macro is showed on Page22 on
Appendix.- Project
3.1.5
J u m p t o R AM t o E x e c u t e t h e R A M C O D E
The code that has been copied from the ROM to the RAM is called by instructions.
For example, if Flash Erase and Flash Write routine have been copied to the RAM, and _EraseStart is the start
address of Flash Erase routine and _WriteStart is the start address of Flash Write routine, they can be called by
instructions below:
CALL _EraseStart
or
CALL _WriteStart
Then the program jump to RAM where RAMCODE is located and RAMCODE is executed within RAM.
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F²MC - 8FX Family, MB95200H/210H Series, Flash Operation
3.2
Flashing Routines
The following assembly source code contains the routines to erase and program the flash memory. The following flow
chart shows the algorithm of the routines.
3.2.1
Flash Erase Routine Flow Chart
Figure 9. Flash Erase Routine Flow Chart
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3.2.2
Flash Write Routine Flow Chart
Figure 10. Flash Write Routine Flow Chart
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3.2.3
Flash.asm
Flash.asm is an assembly code to implement Flash write/erase.
Some key points are explained below. For complete Code, refer to Sector 5.1 Sample Code in Chapter 6 Appendix.
1.
_EraseStart is the start address of Flash Erase routine in Flash.asm. _WriteStart is the start address of Flash
Write routine in Flash.asm. They’re exported so that they can be called by instructions in main ().
.EXPORT _EraseStart
.EXPORT _WriteStart
2.
Erase address is saved from EP, which is assigned in main ().
_EraseStart:
MOVW
A,EP
PUSHW A
; Save erase address
Write address is saved from EP, which is assigned in main ().Write data is saved from IX, which is assigned in
main ().
_WriteStart:
PUSHW IX
MOVW
A,EP
PUSHW A
3.
; Save write address
According to erasing/writing Flash automatic algorithm, the U in UAAAH and U5554H is the upper 4bits same as
write address. The code below is to calculate the U and get correct UAAAH and U5554H.
MOVW
ANDW
MOVW
ORW
MOVW
XCHW
MOVW
ORW
MOVW
4.
; Save write data
A,#0xF000
A
A,#0x0AAA
A
EP,A
A,T
A,#0x0554
A
IX,A
; 0x0AAA | (address & 0xf000)
; 0x0554 | (address & 0xf000)
Write Flash enable by setting bit WRE in register FSR.
SETB
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FSR:WRE
; Write Enable
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5.
Erase Flash memory automatic algorithm.
MOV
MOV
MOV
MOV
MOV
MOV
MOV
MOV
MOV
MOV
POPW
MOVW
MOV
MOV
A,#0xAA
; 0x*AAAH <= 0xAA
@EP,A
A,#0x55
; 0x*554 <= 0x55
@IX,A
A,#0x80
; 0x*AAAH <= 0x80
@EP,A
A,#0xAA
; 0x*AAAH <= 0xAA
@EP,A
A,#0x55
; 0x*554 <= 0x55
@IX,A
A
; Restore Erase address
EP,A
A,#10H ; The last data.
@EP,A
; Start Erase
Write Flash memory automatic algorithm.
6.
MOV
MOV
A,#0xAA
@EP,A
; 0xUAAAH <= 0xAA
MOV
MOV
A,#0x55
@IX,A
; 0xU554 <= 0x55
MOV
MOV
POPW
MOVW
POPW
MOVW
MOV
A,#0xA0
@EP,A
A
EP,A
IX
A,IX
@EP,A
; 0xUAAAH <= 0xA0
; write address
; write data
; to write flash
Erase Loop
NOP
NOP
EraseLoop:
BBS
MOV
AND
BZ
BBS
NOP
BBS
FSR:RDY,EraseEnd ; Erase Flash successes?
A,@EP
A,#0x20
; Check Time Out?
EraseLoop
FSR:RDY,EraseEnd ; Erase Flash successes?
FSR:RDY,EraseEnd ; Erase Flash successes?
Write Loop
NOP
NOP
WriteLoop:
BBS
MOV
AND
BZ
BBS
NOP
BBS
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FSR:RDY,WriteEnd ; write Flash successes?
A,@EP
A,#0x20
; to check time out?
WriteLoop
FSR:RDY,WriteEnd ; write Flash successes?
FSR:RDY,WriteEnd ; write Flash successes?
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Why do we need add a NOPx2 before checking of RDY bit before Erase Loop and Write Loop, please refer to RDY
bit in 20.3.1 in Chapter 20 of the MB95200H/210H Series hardware manual.
7.
Erase Flash fails, Reset Flash and Set error Flag in A.
EraseError:
MOV
MOV
MOV
A,#0xF0
0xFF00,A
; Reset Flash
A,#01H ; Set error Flag
Write Flash fails, Reset Flash and Set error Flag in A.
WriteError:
MOV
MOV
MOV
8.
Write Flash disable by clear bit WRE in register FSR.
CLRB
9.
A,#0xF0
0xFF00,A
; Reset Flash
A,#01H ; Set error Flag
FSR:WRE
; write disable
If erase Flash successes, Set success Flag in A.
EraseEnd:
MOV
A,#00H
MOVW EP,A
; normal ack
If write Flash successes, Set success Flag in A.
WriteEnd:
MOV
A,#00H
MOVW EP,A
; normal ack
If the flash is successfully erased, the flash memory should be blank, and NVR data can be programmed to the flash
memory. For details, please refer to Sector 4.1 Reprogram the NVR after Erasing in Chapter 4 Notes on Flash
Operation.
NVR_Write:
MOVW
MOV
MOVW
CALL
MOVW
MOV
MOVW
CALL
MOVW
MOV
MOVW
CALL
MOVW
MOV
MOVW
CALL
RET
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EP,#0xFFBC
A,0x0FE4
IX,A
_WriteStart
EP,#0xFFBD
A,0x0FE5
IX,A
_WriteStart
EP,#0xFFBE
A,0x0FEB
IX,A
_WriteStart
EP,#0xFFBF
A,0x0FEC
IX,A
_WriteStart
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3.3
Sub Functions
The next level in the hierarchy is the flash erase and flash write functions, which transfers flash operation address
and data to the assembly flash routine in the RAM area and then calls them. For complete Code, refer to Sector 6.2
Sample code in Chapter 6 APPENDIX.
3.3.1
Flash Erase C Code
Define global variables.
unsigned char result, Flag;
unsigned short address;
unsigned char data;
According to assembly and c language compile rules, the variable “_address” in assembly language is the same as
variable “address” in c language. The code below is to transfer erase address assigned in main () to EP, which will be
used in flash.asm.
MOVW A, _address
MOVW EP,A
The assembly Flash Erase routine in the RAM area is called by
CALL _EraseStart
_EraseStart is the start address of Flash Erase routine in Flash.asm. Then the program jumps to RAM, and will run in
RAM.
3.3.2
Flash Write C Code
The code below is to transfer write address assigned in main () to EP, and data to IX which will be used in flash.asm.
MOV
MOVW
MOVW
MOVW
A,_data
IX,A
A, _address
EP,A
;write data
;write address
The assembly Flash write routine in the RAM area is called by
CALL _WriteStart
_WriteStart is the start address of Flash write routine in Flash.asm. Then the program jumps to RAM, and will run in
RAM.
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F²MC - 8FX Family, MB95200H/210H Series, Flash Operation
3.4
How to Use the Programming Functions
Below is a short demonstration C main code, which shows how to use the flash programming functions. For complete
Code, refer to Sector 6.2 Sample code in Chapter 6 APPENDIX.
EraseStart is the start address of Flash Erase routine in Flash.asm. WriteStart is the start address of Flash Write
routine in Flash.asm. EraseStart and WriteStart are imported so that they can be called by instructions in main ().
According to assembly and c language compile rules, “_EraseStart” in assembly language is the same as
“EraseStart” in c language, and “_WriteStart” is the same as “WriteStart”.
extern EraseStart;
extern WriteStart;
The user can add program here, according to the result of flash operation.
void error(void)
{
// do something here
}
void success(void)
{
// do something here
}
The write address “0xF800” and data “0xA0” are transferred to Flash.asm by global variables address and data. And
the write address “0xF800” and data “0xA0” could be assigned by user.
address = 0xF800;//write address
data = 0xA0;
//write data
The flash_write () is called, and result of write flash is return to Flag.
Flag = flash_write();
Flag ==1, write flash fails, do something in error (). Flag == 0, write flash successes, do something in success ().
if (Flag == 1)
error();
else
success();
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4
Notes on Flash Operation
This chapter provides notes on flash operation.
4.1
Reprogram the NVR after Erasing
1.
A flash erase operation will erase all NVR data.
The flash writer carries out the following procedure to keep original system settings.
Make a backup of data in CRTH: CRTH4-CRTH0 and CRTL: CRTL4-CRTL0.
Erase the flash.
Restore all data in CRTH: CRTH4-CRTH0 and CRTL: CRTL4-CRTL0 to the NVR flash area.
If there is new data in CRTH: CRTH4-CRTH0 and CRTL:CRTL4-CRTL0, the flash writer will program the new data to
the NVR flash area.
2.
4.2
Programming NVR data is the same as programming bytes to flash. For details please refer to Chapter 20 and 23
of the MB95200H/210H Series hardware manual.
High Voltage Supply on RST PIN
Apply a high DC voltage (+10V) to the RST pin while writing data to or erasing all data from the flash memory. After
applying the high voltage, wait for 10ms before writing data to or erasing all data from the flash memory. Keeps the
voltage at the RST pin until data writing or erasing is completed.
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5
Appendix
5.1
Sample Code
5.1.1
Project
Name: Flash operation
Function: demonstrates the flash operation.
main.c
/*
SAMPLE CODE
*/
/******************************************************************************
Main.C:
flash.asm located in RAM.
See README.TXT for project description and disclaimer.
******************************************************************************/
#include "mb95200.h"
unsigned char result, Flag;
unsigned short
address;
unsigned char data;
extern EraseStart;
extern WriteStart;
/******************************************************************************
Name:
error ();
Function:
flash operation error handle process
******************************************************************************/
void error(void)
{
// do something here
}
/******************************************************************************
Name:
success ();
Function:
flash operation success handle process
******************************************************************************/
void success(void)
{
// do something here
}
/******************************************************************************
Name:
flash_erase ();
Function:
flash erase operation entrance
******************************************************************************/
unsigned char flash_erase(void)
{
#pragma asm
MOVW A, _address
// set erase address
MOVW EP,A
CALL
_EraseStart // Start erase subrountin
MOV
_result,A
// Reture the result for flash erase
#pragma endasm
return result;
}
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/******************************************************************************
Name:
flash_write ();
Function:
flash write operation entrance
******************************************************************************/
unsigned char flash_write(void)
{
#pragma asm
MOV A,_data
// set write data
MOVW IX,A
MOVW A, _address
// set write address
MOVW EP,A
CALL _WriteStart
// Start Flash write subroutine
MOV
_result,A
// Reture the result for flash write
#pragma endasm
return result;
}
/******************************************************************************
Name:
main ();
Function:
main loop, a sample for flash write function usage
******************************************************************************/
void main (void)
{
// Please follow procedure below to write flash
// During writing data or erasing all data in flash memory,
// a typical +10VDC voltage should be applied at the RST pin.
// After applying the high voltage,
// wait for 10ms before writing data or erasing all data in flash memory.
// And this applied voltage should be kept at the RST pin until data writing or
// erasing has completed.
address = 0xF800;
// set write address
data = 0xA0;
// set write data
Flag = flash_write();
// flash write routine
//
//
//
//
//
//
//
//
//
//
//
//
//
//
//
//
//
//
}
if (Flag == 1)
error();
else
success();
Please follow procedure below to erase flash
(1) Copy out all NVR contents from register: 0x0FE4, 0x0FE5, 0X0FEB, 0x0FEC.
(2) Erase flash
(3) Restore all NVR contents to flash area: 0xFFBC, 0xFFBD, 0XFFBE, 0xFFBF.
(1) Copy out,add your routine
(2) Erase flash
address = 0xF800;
Flag = flash_erase();
if (Flag == 1)
error();
else
success();
(3) Restore, add your routine
In this demonstration, restore is implemented in _EraseStart, if flash erase
successes.And because flash has been erased, the routine can't return to
main routine which is located in Flash Memory. So, all NVR contents have to be
restored to flash area in _EraseStart.
NOTE: when flash_erase() routine is used, pay more attention please!
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flash.asm
;
SAMPLE CODE
;-----------------------------------------------------------------------; flash.asm
; - description and disclaimer see readme.txt
; flash.asm is a code module to demonstrate how to use Flash memory write/erase.
; flash.asm is located in RAM area and all functions within flash.asm are also
; located in RAM.
; flash.asm is called by main(), which is located in Flash Memory.
;
;
;
;
;
A is used to indicate the status of the programmimg:
A : Reture Flag
0 : Successed
1 : Fail
---------------------------------------------------------------------.SECTION RAMCODE, CODE
.EXPORT _EraseStart
.EXPORT _WriteStart
; FlashROM control register
WRE
.equ
1
; Flash enable flag
RDY
.equ
4
; Flash finish flag
FSR
.equ
0x0072 ; Flash control register
; EP
:
Operation Address
; IX
:
Operation Data
;+++++++++++++++++++++++++++++++++++++++
; Command_Process
; Flash Erase
;
IN
:
EP : Erase Sector Address
;
OUT
:
A : Return Flag
;
0 : Successed
;
1 : Fail
;+++++++++++++++++++++++++++++++++++++++
_EraseStart:
MOVW
A,EP
PUSHW A
; Save write address
MOVW
ANDW
MOVW
ORW
MOVW
XCHW
MOVW
ORW
MOVW
A,#0xF000
A
A,#0x0AAA
A
EP,A
A,T
A,#0x0554
A
IX,A
; 0x0AAA | (address & 0xf000)
SETB
FSR:WRE
; Write Enable
MOV
MOV
A,#0xAA
@EP,A
; 0x*AAAH <= 0xAA
MOV
MOV
A,#0x55
@IX,A
; 0x*554 <= 0x55
MOV
A,#0x80
; 0x*AAAH <= 0x80
; 0x0554 | (address & 0xf000)
EraseGo:
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MOV
@EP,A
MOV
MOV
A,#0xAA
@EP,A
; 0x*AAAH <= 0xAA
MOV
MOV
A,#0x55
@IX,A
; 0x*554 <= 0x55
POPW
MOVW
MOV
mov
A
EP,A
A,#10H
@EP,A
; Restore Erase address
; The last data.
; Start Erase
NOP
NOP
EraseLoop:
BBS
MOV
AND
BZ
BBS
NOP
BBS
EraseError:
MOV
MOV
MOV
CLRB
RET
FSR:RDY,EraseEnd
A,@EP
A,#0x20
EraseLoop
FSR:RDY,EraseEnd
; Check Time Out?
FSR:RDY,EraseEnd
A,#0xF0
0xFF00,A
A,#01H
FSR:WRE
; Reset Flash
; Set error Flag
; write disable
EraseEnd:
MOV
A,#00H
; normal ack
CLRB
FSR:WRE
; write disable
;In this demonstration, restore is implemented in _EraseStart, if flash erase
;successes. Because flash has been erased, the routine can't return to main
;routine which is located in Flash Memory. So, all NVR contents have to be
;restored to flash area here.
NVR_Write:
MOVW
EP,#0xFFBC
MOV
A,0x0FE4
MOVW
IX,A
CALL
_WriteStart
MOVW
MOV
MOVW
CALL
EP,#0xFFBD
A,0x0FE5
IX,A
_WriteStart
MOVW
MOV
MOVW
CALL
EP,#0xFFBE
A,0x0FEB
IX,A
_WriteStart
MOVW
MOV
MOVW
CALL
RET
EP,#0xFFBF
-A,0x0FEC
IX,A
_WriteStart
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;==========================================================================
;+++++++++++++++++++++++++++++++++++++++
; Command_Process
; Flash Write
;
IN
:
EP : Write Address
;
IX : Write Data
;
OUT
:
A : Return Flag
;
0 : Successed
;
1 : Fail
;+++++++++++++++++++++++++++++++++++++++
_WriteStart:
PUSHW IX
; Save write data
MOVW
A,EP
PUSHW A
; Save write address
SETB
MOVW
ANDW
MOVW
ORW
MOVW
XCHW
MOVW
ORW
MOVW
MOV
MOV
MOV
MOV
MOV
MOV
POPW
MOVW
POPW
MOVW
MOV
NOP
NOP
WriteLoop:
BBS
MOV
AND
BZ
FSR:WRE
A,#0xF000
A
A,#0x0AAA
A
EP,A
A,T
A,#0x0554
A
IX,A
A,#0xAA
@EP,A
A,#0x55
@IX,A
A,#0xA0
@EP,A
A
EP,A
IX
A,IX
@EP,A
; Write Enable
; 0x0AAA | (address & 0xf000)
; 0x0554 | (address & 0xf000)
; 0xUAAAH <= 0xAA
; 0xU554 <= 0x55
; 0xUAAAH <= 0xA0
; write address
; write data
; to write flash
FSR:RDY,WriteEnd
A,@EP
A,#0x20
WriteLoop
; to check time out?
BBS
FSR:RDY,WriteEnd
NOP
BBS
FSR:RDY,WriteEnd
WriteError:
MOV
A,#0xF0
MOV
0xFF00,A
; Reset Flash
MOV
A,#01H
; Set error Flag
CLRB
FSR:WRE
; write disable
RET
WriteEnd:
MOV
A,#00H
; Set normal Flag
CLRB
FSR:WRE
; write disable
RET
;==========================================================================
www.cypress.com
Document No. 002-05384 Rev.*A
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F²MC - 8FX Family, MB95200H/210H Series, Flash Operation
Startup.asm
; Sample program for initialization
;-------------------------------------------------------------------------.PROGRAM
start
.TITLE
start
;-------------------------------------------------------------------------; variable define declaration
;-------------------------------------------------------------------------#define HWD_DISABLE
; if define this, Hard Watchdog will disable.
;-------------------------------------------------------------------------; external declaration of symbols
;-------------------------------------------------------------------------.EXPORT
__start
.IMPORT
_main
.IMPORT
LMEMTOMEM
.IMPORT
LMEMCLEAR
.IMPORT
_RAM_INIT
.IMPORT
_ROM_INIT
.IMPORT
_RAM_DIRINIT
.IMPORT
_ROM_DIRINIT
.IMPORT
_RAM_RAMCODE
.IMPORT
_ROM_RAMCODE
;-------------------------------------------------------------------------; definition to stack area
;-------------------------------------------------------------------------.SECTION
STACK,
STACK,
ALIGN=1
.RES.B
128-2
STACK_TOP:
.RES.B
2
;-------------------------------------------------------------------------; definition to start address of data, const and code section
;-------------------------------------------------------------------------.SECTION
RAMCODE, CODE, ALIGN=1
.SECTION
DIRDATA,
DIR,
ALIGN=1
.SECTION
DIRINIT,
DIR,
ALIGN=1
.SECTION
DATA,
DATA, ALIGN=1
.SECTION
INIT,
DATA, ALIGN=1
;-------------------------------------------------------------------------; code area
;-------------------------------------------------------------------------.SECTION
CODE,
CODE,
ALIGN=1
__start:
;-------------------------------------------------------------------------; set stack pointer
;-------------------------------------------------------------------------MOVW
A, #STACK_TOP
MOVW
SP, A
;
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Document No. 002-05384 Rev.*A
21
F²MC - 8FX Family, MB95200H/210H Series, Flash Operation
-------------------------------------------------------------------------; set register bank is 0
;-------------------------------------------------------------------------MOVW
A, PS
MOVW
A, #0x07FF
ANDW
A
MOVW
PS, A
;-------------------------------------------------------------------------; set ILM to the lowest level(3)
;-------------------------------------------------------------------------MOVW
A, PS
MOVW
A, #0x0030
ORW
A
MOVW
PS, A
;-------------------------------------------------------------------------; *copy initial value *CONST(ROM) section to *INIT(RAM) section
;-------------------------------------------------------------------------#macro
ICOPY src_addr, dest_addr, src_section
MOVW
EP, #\src_addr
MOVW
A, #\dest_addr
MOVW
A, #SIZEOF (\src_section)
CALL
LMEMTOMEM
#endm
ICOPY _ROM_INIT,
_RAM_INIT,
INIT
ICOPY _ROM_DIRINIT, _RAM_DIRINIT, DIRINIT
ICOPY _ROM_RAMCODE, _RAM_RAMCODE, RAMCODE
;-------------------------------------------------------------------------; zero clear of *VAR section
;-------------------------------------------------------------------------#macro
FILL0 src_section
MOVW
A, #\src_section
MOVW
A, #SIZEOF (\src_section)
CALL
LMEMCLEAR
#endm
FILL0 DIRDATA
FILL0 DATA
;-------------------------------------------------------------------------; call main routine
;-------------------------------------------------------------------------CALL
_main
end:
JMP
end
;-------------------------------------------------------------------------; Hard Watchdog
;-------------------------------------------------------------------------#ifdef HWD_DISABLE
.SECTION WDT, CONST, LOCATE=H'FFBE
.DATA.W
0xA596
#endif
;-------------------------------------------------------------------------; reset vector
;-------------------------------------------------------------------------.SECTION
RESET,
CONST,
LOCATE=0xFFFC
.DATA.B
0xFF
.DATA.B
0
.DATA.H
__start
.END
www.cypress.com
__start
Document No. 002-05384 Rev.*A
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F²MC - 8FX Family, MB95200H/210H Series, Flash Operation
6
Additional Information
For more information on Cypress Microcontrollers Products, please visit the following websites:
http://www.cypress.com/cypress-microcontrollers
http://www.cypress.com/cypress-mcu-product-softwareexamples
www.cypress.com
Document No. 002-05384 Rev.*A
23
F²MC - 8FX Family, MB95200H/210H Series, Flash Operation
Document History
Document Title: AN205384 – F²MC - 8FX Family, MB95200H/210H Series, Flash Operation
Document Number: 002-05384
Revision
ECN
Orig. of
Change
Submission
Date
**
-
Jacky, Zhou
20/03/2008
V1.0, First Draft
21/07/2008
V1.1, Add Explanation of ICOPY command in 3.1.4
Description of Change
Add Explanation of why need NOPx2 command in 3.2.3
*A
5264357
www.cypress.com
HUAL
02/11/2009
V1.2, correct an error about NVR_Write in page 19, 29
05/09/2016
Migrated Spansion Application Note “MCU-AN-500015-E-12” to Cypress format.
Document No. 002-05384 Rev.*A
24
F²MC - 8FX Family, MB95200H/210H Series, Flash Operation
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© Cypress Semiconductor Corporation,2008-2016. This document is the property of Cypress Semiconductor Corporation and its subsidiaries, including
Spansion LLC (“Cypress”). This document, including any software or firmware included or referenced in this document (“Software”), is owned by
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Cypress, the Cypress logo, Spansion, the Spansion logo, and combinations thereof, PSoC, CapSense, EZ-USB, F-RAM, and Traveo are trademarks or
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Document No. 002-05384 Rev.*A
25