STV6688A Ver la hoja de datos (PDF) - STMicroelectronics

Número de pieza

componentes Descripción

Fabricante

STV6688A

Video Switch Matrix for TV Applications with S Terminal

STMicroelectronics 

STV6688

Electrical Characteristics

Figure 2: I²C Bus Timings

SDA

SCL

t BUF

SDA

(Start, Stop)

t LOW

t HD,STA

tr

t SU,STA

tf

t HD,DAT t HIGH

t SU,DAT

t SU,STO

2.5 I²C Bus Selection

Data transfers follow the usual I²C format:

after the Start condition (S), a 7-bit slave

address is sent, followed by an 8-bit word

which is a data direction bit (W). An 8-bit

sub-address is sent to select a register,

followed by an 8-bit data word to be

included in the register.

S

SLAVE ADDRESS: 94h

Input Signals Summary: (Write

Reg.Addr.

(Hex)

D7

General

Stand-by

D6

D5

Buffer Always set

Stand-by

to 1

Input Signal: (Write Mode) Data Byte

The I²C Bus Decoder of the

microcontroller provides the Automatic

Incrementation mode in Write mode.

String Format: Write Only mode (S =

Start condition, P = Stop condition, A

= Acknowledge)

A 00h A

Mode)

Data

D4

D3

D2

DATA

A

P

D1

D0

Switch Control

Reg.

Addr.

0x00

Description

General Stand-by

Buffer Stand-by

Y/CVBS and

C Selection

Data

Bits

D7 D6 D5 D4 D3 D2 D1 D0

Comments

1

0 X 1 X X X X X All disabled

1 X 1 X X X X X All active

1

X 0 1 X X X X X Buffer disabled

X 1 1 X X X X X Buffer active

2

X X 1 X X X 0 0 INT TV

X X 1 X X X 0 1 IN1

X X 1 X X X 1 0 IN2

X X 1 X X X 1 1 IN3

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