MCP39F511N datasheet(16/61 Pages) MICROCHIP

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 2015-2018 Microchip Technology Inc.

DS20005473B-page 16

MCP39F511N

4.4

Command List

The following table is a list of all accepted command

bytes for the MCP39F511N. There are 10 possible

accepted commands for the MCP39F511N.

4.5

Example Communication Frames

and MCP39F511N Responses

Tables 4-2

4-11

show

exact

hexadecimal

communication frames as they are recommended to be

sent to the MCP39F511N from the system MCU. The

values here can be used as direct examples for writing

the code to communicate to the MCP39F511N.

TABLE 4-1:

MCP39F511N INSTRUCTION SET

Command

Instruction

Parameter

Number

of bytes

Successful

Response

UART_TX

0x4E

Number of bytes

ACK, Data,

Checksum

0x4D

Number of bytes

1+N

ACK

Set Address Pointer

0x41

ADDRESS

ACK

Save Registers To Flash

0x53

None

ACK

Page Read EEPROM

0x42

PAGE

ACK, Data,

Checksum

Page Write EEPROM

0x50

PAGE

ACK

Bulk Erase EEPROM

0x4F

None

ACK

Auto-Calibrate Gain

0x5A

Channel Selection (1)

Note 2

Auto-Calibrate Reactive Gain

0x7A

Channel Selection (1)

Note 2

Auto-Calibrate Frequency

0x76

None

Note 2

Note 1:

Each bit in the instruction parameter byte refers to the corresponding channel that is being calibrated with

the command. For example, if bits 0 and 1 are high, both channels 1 and 2 will be calibrated. A NAK or

ACK will be returned. If a NAK is returned, refer to the Calibration Status bits in the Event Configuration

See Section 9.0 “MCP39F511N Calibration” for more information on calibration.

TABLE 4-2:

Byte #

Value

Description

Response from MCP39F511N

0xA5

Header Byte

0x08

Number of Bytes in Frame

0x41

Command (Set Address Pointer)

40x00

Address High

0x02

Address Low

0x4E

Command (Register Read, N Bytes)

0x20

Number of Bytes to Read (32)

0x5E

Checksum

ACK + Number of Bytes (35) + 32 bytes +

Checksum

Note 1: This example Register Read, N bytes frame, as it is written here, can be used to poll a subset of the

output data, starting at the top, address 0x02, and reading 32 data bytes back or 35 bytes total in the frame.

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