X98021 datasheet(27/29 Pages) RENESAS

27 / 29 page

X98021

FN8219 Rev 3.00

Page 27 of 29

March 8, 2006

X98021 Serial Bus Address Write

This is the 7 bit address of the X98021 on the 2 wire bus. The

address is 0x4C if pin 48 is low, 0x4D if pin 48 is high. Shift this

value to left when adding the R/W bit

X98021 Register Data Write(s)

This is the data to be written to the X98021’s configuration register.

Note: The X98021’s Configuration Register’s address pointer auto

increments after each data write: repeat this step to write multiple

sequential bytes of data to the Configuration Register.

(pin 48)

R/W

X98021 Register Address Write

This is the address of the X98021’s configuration register that

the following byte will be written to.

X98021 Serial Bus Address

START Command

STOP Command

(Repeat if desired)

Signals the beginning of serial I/O

Signals the ending of serial I/O

Data

Write*

Address

Serial Bus

Address

aaaaaaaa

dddddddd

100110 A 0

* The data write step may be repeated to write to the X98021’s

Configuration Register sequentially, beginning at the Register

Address written in the previous step.

SDA Bus

Signals from

the X98021

Signals from

the Host

FIGURE 15. CONFIGURATION REGISTER WRITE

X98021 Datasheet(PDF) 27 Page - Renesas Technology Corp