P9225-R Datasheet

© 2018 Integrated Device Technology, Inc.

23

November 12, 2018

11. 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 P9225-R. The default I2C slave address is 61HEX.

Table 9.

Device Identification Register

Address and Bit

Register Field Name

R/W Default

Function and Description

0000HEX [7:0]

Part_number_L

R

25HEX

Chip ID low byte

0001HEX [7:0]

Part_number_H

R

92HEX

Chip ID high byte

Table 10. Firmware Major Revision

Address and Bit

Register 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 11. Firmware Minor Revision

Address and Bit

Register Field Name

R/W Default

Function and Description

0006HEX [7:0]

FW_Minor_Rev_L

R

27HEX

Minor firmware revision low byte

0007HEX [7:0]

FW_Minor_Rev_H

R

04HEX

Minor firmware revision high byte

Table 12. Status Registers

Address and Bit

Register 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]

Reserved

R

0BIN

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 is

less than 0.6V. The P9225-R sends an End Power Transfer (EPT)

packet to the transmitter.

0034HEX [1]

VRECT_OV_ Status

R

0BIN

“1” indicates rectifier exceeds 20V for VOUT=12. The P9225-R

sends an End Power Transfer (EPT) packet to the transmitter.

0034HEX [0]

Current_Limit_Status

R

0BIN

“1” indicates current limit has been exceeded. The P9225-R sends

an End Power Transfer (EPT) packet to the transmitter.

0035HEX [7:0]

Reserved

R

00HEX