MCP2210 datasheet(34/82 Pages) MICROCHIP

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MCP2210

DS22288A-page 34

 2011 Microchip Technology Inc.

3.2

Read/Write RAM Settings

The set of commands/responses described in this section relates to the manipulation of the RAM settings (volatile).

3.2.1

GET (VM) SPI TRANSFER SETTINGS

3.2.1.1

Responses

TABLE 3-33:

COMMAND STRUCTURE

Byte

Index

Meaning

0x41 – Get (VM) SPI Transfer Settings – command code

0x00 – Reserved

3-63

0x00 – Reserved

TABLE 3-34:

RESPONSE 1 STRUCTURE

Byte

Index

Meaning

0x41 – Get SPI Transfer Settings (volatile memory)

0x00 – Command Completed Successfully

Size in Bytes of the SPI Transfer Structure: 17 (in decimal) = 0x11

Don’t Care

Bit Rate (Byte 3) – 32-bit value (Byte 0, Byte 1, Byte 2, Byte 3)

Example: Bit rate = 12,000,000 bps = 00B7 1B00

- This byte position will have a value of = 0x00

Bit Rate (Byte 2) – 32-bit value (Byte 0, Byte 1, Byte 2, Byte 3)

Example: Bit rate = 12,000,000 bps = 00B7 1B00

- This byte position will have a value of = 0x1B

Bit Rate (Byte 1) – 32-bit value (Byte 0, Byte 1, Byte 2, Byte 3)

Example: Bit rate = 12,000,000 bps = 00B7 1B00

- This byte position will have a value of = 0xB7

Bit Rate (Byte 0) – 32-bit value (Byte 0, Byte 1, Byte 2, Byte 3)

Example: Bit rate = 12,000,000 bps = 00B7 1B00

- This byte position will have a value of = 0x00

Idle Chip Select Value – 16-bit value (low byte):

• MSB

–

LSB

CS7 CS6 CS5 CS4 CS3 CS2 CS1 CS0

Idle Chip Select Value – 16-bit value (high byte):

• MSB

–

LSB

CS8

Active Chip Select Value – 16-bit value (low byte):

• MSB

–

LSB

CS7 CS6 CS5 CS4 CS3 CS2 CS1 CS0

Active Chip Select Value – 16-bit value (high byte):

• MSB

–

LSB

CS8

Chip Select to Data Delay (quanta of 100 µs) – 16-bit value (low byte)

Example: If we have 500 µs delay between the CS being asserted and the first byte of data, the value

will be 0x0005.

- This byte position will have a value of: 0x05

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