STA015 datasheet(18/56 Pages) STMICROELECTRONICS

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6.1 STA015 REGISTERS DESCRIPTION

The STA015 device includes 128 I2C registers. In this document, only the user-oriented registers are de-

scribed. The undocumented registers are reserved. These registers must never be accessed (in Read or

in Write mode). The Read-Only registers must never be written.

The following table describes the meaning of the abbreviations used in the I2C registers description:

VERSION

Address: 0x00 (00)

Type: RO

The VERSION register is read-only and it is used to identify the IC on the application board.

IDENT

Address: 0x01

Type: RO

Software Reset: 0xAC

Hardware Reset: 0xAC

IDENT is a read-only register and is used to identify the IC on an application board. IDENT always has the

value "0xAC"

PLLCTL

Address: 0x05

Type: R/W

Software Reset: 0x21

Hardware Reset: 0x21

Symbol

Comment

Not Applicable

UND

Undefined

No Charge

Read Only

Write Only

R/W

Read and Write

R/WS

Read, Write in specific mode

MSB

LSB

MSB

LSB

1011

MSB

LSB

XTO_BUF

XTODIS

OCLKEN

SYS2OCLK

PPLDIS

XTI2DSPCLK

XTI2OCLK

UPD_FRAC

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