U6239B datasheet(8/15 Pages) TEMIC

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U6239B

TELEFUNKEN Semiconductors

Rev. A3, 28-May-97

8 (15)

I2C Bus Description (continued)

Description

I2C Bus Read Data Format

MSB

LSB

Address byte

AS1

AS2

Status byte

POR

–

POR :

Power-on reset flag:

POR = 1 on power on

FL :

In-lock flag:

FL = 1, when loop is phase locked

I2, I1, I0 :

Digital information of I/O-ports P7, P5 and P4 respectively

A2, A1, A0 : Digital data of the 5-level ADC.

see next table

A/D Converter Levels:

Input voltage to ADC Pin 9

60% Vs to 13.2 V

45% to 60% Vs

30% to 45% Vs

15% to 30% Vs

0 V to 15% Vs

I2C Bus Pulse Diagram

Address byte

/ A /

1.Byte

/ A /

2.Byte

/ A /

3.Byte

4.Byte

/ A /

SDA

SCL

START

1...

STOP

9611811

Data transfer examples

START – ADR – PDB1 – PDB2 – CB1 – CB2 – STOP

START – ADR – CB1 – CB2 – PDB1 – PDB2 – STOP

START – ADR – PDB1 – PDB2 – CB1 – STOP

START – ADR – PDB1 – PDB2 – STOP

START – ADR – CB1 – CB2 – STOP

START – ADR – CB1 – STOP

Description

START

= Start condition

ADR

= Address byte

PDB1

= Programmable divider byte 1

PDB2

= Programmable divider byte 2

CB1

= Control byte 1

CB2

= Control byte 2

STOP

= Stop condition

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