MCP2210
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
TABLE 3-33: COMMAND STRUCTURE
Byte
Index
Meaning
0
1
0x41 – Get (VM) SPI Transfer Settings – command code
0x00 – Reserved
2
0x00 – Reserved
3-63
0x00 – Reserved
3.2.1.1
Responses
TABLE 3-34: RESPONSE 1 STRUCTURE
Byte
Index
Meaning
0
1
2
3
4
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
5
6
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
7
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
8
Idle Chip Select Value – 16-bit value (low byte):
• MSB
–
–
–
–
–
–
LSB
CS7 CS6 CS5 CS4 CS3 CS2 CS1 CS0
9
Idle Chip Select Value – 16-bit value (high byte):
• MSB
x
–
x
–
x
–
x
–
x
–
x
–
x
LSB
CS8
10
11
12
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
x
–
x
–
x
–
x
–
x
–
x
–
x
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
DS22288A-page 34
2011 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
