P9221-R3 Datasheet

© 2017 Integrated Device Technology, Inc.

30

October 20, 2017

12. Functional Registers

The following tables provide the address locations, field names, available operations (R or RW), default values, and functional descriptions of

all the internally accessible registers contained within the P9221-R3. The default I2C slave address is 61HEX. The address of each register has

a two-byte structure. For example, the address of chip ID high byte read from 00HEX and 01HEX.

Table 11. Device Identification Register

Address and Bit

Register or Bit Field Name

R/W

Default

Function and Description

0000HEX [7:0]

Part_number_L

R

20HEX

Chip identification low byte.

0001HEX [7:0]

Part_number_H

R

92HEX

Chip identification high byte.

Table 12. Firmware Major Revision

Address and Bit

Register or Bit Field Name

R/W

Default

Function and Description

0004HEX [7:0]

FW_Major_Rev_L

R

01HEX

Major firmware revision low byte.

0005HEX [7:0]

FW_Major_Rev_H

R

00HEX

Major firmware revision high byte.

Table 13. Firmware Minor Revision

Address and Bit

Register or Bit Field Name

R/W

Default

Function and Description

0006HEX [7:0]

FW_Minor_Rev_L

R

29HEX

Minor firmware revision low byte.

0007HEX [7:0]

FW_Minor_Rev_H

R

04HEX

Minor firmware revision high byte.

Table 14. Status Registers

Address and Bit

Register or Bit Field Name

R/W

Default

Function and Description

0034HEX [7]

Vout_Status

R

0BIN

“0” output voltage is off.

“1” output voltage is on.

0034HEX [6]

Reserved

R

0BIN

0034HEX [5]

Reserved

R

0BIN

0034HEX [4]

User_Data_Received

R

0BIN

“1” indicates that the P9221-R3 has received data from the

P9242-R3. This bit must be reset after the application

processor reads the user data. This bit can be reset by

writing 20HEX to the 004EHEX register

0034HEX [3]

Reserved

R

0BIN

0034HEX [2]

Thermal_SHTDN_Status

R

0BIN

“0” indicates no over-temperature condition exists.

“1” indicates that the die temperature exceeds 130°C or the

NTC reading is less than 0.6V. The P9221-R3 sends an End

Power Transfer (EPT) packet to the transmitter.