AN247 datasheet(16/32 Pages) MICROCHIP

16 / 32 page

AN247

DS00247A-page 16

 2003 Microchip Technology Inc.

;* Put commands sent upon receiving Get command (Slave --> Master)

;* YYYYYYYYYYY 0 0 8 YYYYYYYY YYYYYY00 ADDRL ADDRH ADDRU RESVD STATS RESVD RESVD RESVD

;* YYYYYYYYYYY 0 0 8 YYYYYYYY YYYYYY01 DATA0 DATA1 DATA2 DATA3 DATA4 DATA5 DATA6 DATA7

;* Put commands sent upon receiving Put command (if enabled) (Slave --> Master)

;* This is the acknowledge after a put.

;* YYYYYYYYYYY 0 0 0 YYYYYYYY YYYYYY00 _NA__ _NA__ _NA__ _NA__ _NA__ _NA__ _NA__ _NA__

;* YYYYYYYYYYY 0 0 0 YYYYYYYY YYYYYY01 _NA__ _NA__ _NA__ _NA__ _NA__ _NA__ _NA__ _NA__

;* ADDRL - Bits 0 to 7 of the memory pointer.

;* ADDRH - Bits 8 - 15 of the memory pointer.

;* ADDRU - Bits 16 - 23 of the memory pointer.

;* RESVD - Reserved for future use.

;* CTLBT - Control bits.

;* SPCMD - Special command.

;* CPDTL - Bits 0 - 7 of special command data.

;* CPDTH - Bits 8 - 15 of special command data.

;* DATAX - General data.

;* Control bits:

;* MODE_WRT_UNLCK-Set this to allow write and erase operations to memory.

;* MODE_ERASE_ONLY-Set this to only erase Program Memory on a put command. Must be on 64-byte

boundary.

;* MODE_AUTO_ERASE-Set this to automatically erase Program Memory while writing data.

;* MODE_AUTO_INC-Set this to automatically increment the pointer after writing.

;* MODE_ACK-Set this to generate an acknowledge after a 'put' (PG Mode only)

;* Special Commands:

;* CMD_NOP

0x00

Do nothing

;* CMD_RESET

0x01

Issue a soft reset

;* CMD_RST_CHKSM

0x02

Reset the checksum counter and verify

;* CMD_CHK_RUN

0x03

Add checksum to special data, if verify and zero checksum

then clear the last location of EEDATA.

;* Memory Organization (regions not shown to scale):

|-------------------------------|0x000000 (Do not write here!)

Boot Area

|-------------------------------|0x000200

Prog Mem

|-------------------------------|0x1FFFFF

User ID

|0x200000

|-------------------------------|

|:::::::::::::::::::::::::::::::|

|-------------------------------|

Config

|0x300000

|-------------------------------|

|:::::::::::::::::::::::::::::::|

|-------------------------------|

Device ID

|0x3FFFFE - 0x3FFFFF

|-------------------------------|

|:::::::::::::::::::::::::::::::|

|-------------------------------|0xF00000

EEDATA

(remapped)

|(Last byte used as boot flag)

|-------------------------------|0xFFFFFF

;

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