PCA9561 查看數據表（PDF） - NXP Semiconductors.

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PCA9561

Quad 6-bit multiplexed I2C-bus EEPROM DIP switch

NXP Semiconductors. 

NXP Semiconductors

PCA9561

Quad 6-bit multiplexed I2C-bus EEPROM DIP switch

Table 5. Commands register

All other combinations are reserved.

Command value

D7 D6 D5 D4 D3 D2 D1 D0

1

1

1

1

0

0

0

0

1

1

1

1

0

1

0

0

1

1

1

1

1

0

0

0

1

1

1

1

1

1

0

0

1

1

1

1

0

0

0

1

1

1

1

1

0

1

0

1

1

1

1

1

1

0

0

1

1

1

1

1

1

1

0

1

1

1

1

1

X

X

1

0

Command function

MUX_SELECT = 1

MUX_SELECT = 0

EEPROM byte 0

EEPROM byte 0

EEPROM byte 1

EEPROM byte 1

EEPROM byte 2

EEPROM byte 2

EEPROM byte 3

EEPROM byte 3

MUX_IN

EEPROM byte 0

MUX_IN

EEPROM byte 1

MUX_IN

EEPROM byte 2

MUX_IN

EEPROM byte 3

MUX_IN

MUX_IN

6.3 Register description

If the Control register byte is an EEPROM address, the next byte will be programmed into

that EEPROM address on the following STOP condition, if WP is logic 0. If more than one

byte is sent sequentially, the second byte will be written in the other volatile register, on

the following STOP condition. Up to four bytes can be sent sequentially. If any more data

bytes are sent after the fourth byte, they will not be acknowledged and no bytes will be

written to the non-volatile registers. After a byte is read from or written to the EEPROM,

the part automatically points to the next non-volatile register. If the Command register

code was FFh, the MUX_IN values are sent with the two MSBs padded with zeros as

shown below. If the command register code is 00h, then the non-volatile register 0 is sent.

If the command register code is 01h, then the non-volatile register 1 is sent. If the

command register code is 02h, then the non-volatile register 2 is sent. If the command

register code is 03h, then the non-volatile register 3 is sent.

Table 6.

Write

Read

Default

EEPROM byte 0 register

D7

D6

D5

X

X

EEPROM 0

data F

0

0

EEPROM 0

data F

0

0

0

D4

EEPROM 0

data E

EEPROM 0

data E

0

D3

EEPROM 0

data D

EEPROM 0

data D

0

D2

EEPROM 0

data C

EEPROM 0

data C

0

D1

EEPROM 0

data B

EEPROM 0

data B

0

D0

EEPROM 0

data A

EEPROM 0

data A

0

Table 7.

Write

Read

Default

EEPROM byte 1 register

D7

D6

D5

X

X

EEPROM 1

data F

0

0

EEPROM 1

data F

0

0

0

D4

EEPROM 1

data E

EEPROM 1

data E

0

D3

EEPROM 1

data D

EEPROM 1

data D

0

D2

EEPROM 1

data C

EEPROM 1

data C

0

D1

EEPROM 1

data B

EEPROM 1

data B

0

D0

EEPROM 1

data A

EEPROM 1

data A

0

PCA9561

Product data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 4 — 6 November 2012

© NXP B.V. 2012. All rights reserved.

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