CP2120

10

Rev. 0.4

5.1. Command Set

transactions, while other commands modify or monitor CP2120 operation and events.

5.2. Internal Registers

operation and can be read to obtain device status. Commands reading to and writing from the internal registers can

Table 3 shows a list of all internal registers.

5.2.1. Write to Internal Register

A Write to Internal Register command updates the value of one of the CP2120's Internal Registers. A Write to

Internal Register command begins with the command byte, 0x20, followed by the internal register address,

followed by the new value of the internal register. Only one register can be accessed per Write to Internal Register

command.

Table 3. Internal Register Addresses

Internal Register

Address

Section

IOCONFIG

0x00

7.

IOSTATE

0x01

7.

I2CCLOCK

0x02

6.1

I2CTO

0x03

6.1

I2CSTAT

0x04

6.2

I2CADR

0x05

6.1

RXBUFF

0x06

6.3

IOCONFIG2

0x07

7.

EDGEINT

0x08

7.

I2CTO2

0x09

6.1

0x20

COMMAND

REGISTER

X

DATA BYTE

SPI Master