SC18IS600 查看數據表（PDF） - Philips Electronics

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SC18IS600

SPI to I2C-bus interface

Philips Electronics 

NXP Semiconductors

SC18IS600/601

SPI to I2C-bus interface

6.6.7 Write to SC18IS600/601 internal registers

SPI host sends

0x20

REGISTER

COMMAND

X

DATA

BYTE

CS

SCLK

MOSI

character 0x20

register X

Fig 18. Write to SC18IS600/601 internal registers

data byte

002aab723

A Write Register function is initiated by sending a 0x20 command followed by an internal

register address to be written (see Section 6.1). The register data byte follows the register

address. Only one register can be accessed in a single transaction. There is no

auto-incrementing of the register address.

6.6.8 Read from SC18IS600/601 internal register

SPI host sends

0x21

COMMAND

REGISTER

X

REGISTER

DATA

CS

SCLK

MOSI

character 0x21

register X

dummy byte

MISO

data byte

002aab724

Fig 19. Read from SC18IS600/601 internal register

A Read Register function is initiated by sending a 0x21 command followed by an internal

register address to be read (see Section 6.1) and a dummy byte. The data byte of the

read register is returned by the SC18IS600 on the MISO pin. Only one register can be

accessed in a single transaction. There is no auto-incrementing of the register address.

Note that write and read from internal registers are processed immediately as soon as the

SC18IS600/601 determines the intended register.

SC18IS600_601_3

Product data sheet

Rev. 03 — 13 December 2006

© NXP B.V. 2006. All rights reserved.

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