MCP39F521 datasheet(18/52 Pages) MICROCHIP

18 / 52 page

MCP39F521

DS20005442A-page 18

 2015 Microchip Technology Inc.

TABLE 4-3:

Byte #

Value

Byte Description

Response from MCP39F521

0xA5

Header Byte

0x25

Number of Bytes in Frame

0x41

Command (Set Address Pointer)

0x00

Address High

0x48

Address Low

0x4D

Command (Register Write, N Bytes)

0x1C

Number of Bytes to Write (28)

8-36

*Data*

Data Bytes (28 total data bytes)

Checksum

ACK

Note 1:

This Register Write, N Bytes frame, as written here, can be used to write the entire set of

calibration target data, starting at the top, address 0x7A, and continuing to write until the end of this set of

registers, 28 bytes later, register 0x94. Note these are not the calibration registers, but the calibration

targets which need to be written prior to issuing the auto-calibration target commands. See Section 8.0,

MCP39F521 Calibration

for more information.

TABLE 4-4:

SET ADDRESS POINTER COMMAND (Note 1)

Byte #

Value

Byte Description

Response from MCP39F521

0xA5

Header Byte

0x06

Number of Bytes in Frame

0x41

Command (Set Address Pointer)

0x00

Address High

50x02

Address Low

0xEE

Checksum

ACK

Note 1:

The Set Address Pointer command is typically included inside of a frame that includes a read or write

command, as shown in Table 4-2 and Table 4-3. There is typically no reason for this command to have its

own frame, but is shown here as an example.

TABLE 4-5:

SAVE TO FLASH COMMAND

Byte #

Value

Byte Description

Response from MCP39F521

0xA5

Header Byte

0x04

Number of Bytes in Frame

0x53

Command (Save To Flash)

0xFC

Checksum

ACK

TABLE 4-6:

PAGE READ EEPROM COMMAND

Byte #

Value

Byte Description

Response from MCP39F521

0xA5

Header Byte

0x05

Number of Bytes in Frame

0x42

Command (Page Read EEPROM)

0x01

Page Number (e.g. 1)

0xED

Checksum

ACK + EEPROM Page Data + Checksum

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