STV0681 datasheet(37/44 Pages) STMICROELECTRONICS

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ADCS 7283313C

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STV0681

STV0681 pin description

RS232 Interface

TXD

Output

Serial data transmit

(For camera with USB only, this pin should be tied to

RXD)

4mA

(SL)

RXD

Input (S)

Serial data receive

(For camera with USB only, this pin should be tied to

TXD)

STV0680B Master Clocks and Reset

XIN

Input

Quartz Crystal IN

XOUT

Output

Quartz Crystal OUT

RESET

Input (S)

Active (LOW) STV0680B reset

System Memory (SDRAM) Interface

DQMU

Output

Data input/output mask for dram_DQ[15:8]

2mA

(SL)

DCLK

Output

Clock: all SDRAM input signals are sampled on the

positive edge

4mA

(SL)

CKE

Output

Clock enable: activates (HIGH) and deactivates

(LOW) the SDRAM CLK signal

2mA

(SL)

AD0

Output

SDRAM address A0

2mA

(SL)

AD1

Output

SDRAM address A1

2mA

(SL)

AD2

Output

SDRAM address A2

2mA

(SL)

AD3

Output

SDRAM address A3

2mA

(SL)

AD4

Output

SDRAM address A4

2mA

(SL)

AD5

Output

SDRAM address A5

2mA

(SL)

AD6

Output

SDRAM address A6

2mA

(SL)

AD7

Output

SDRAM address A7

2mA

(SL)

AD8

Output

SDRAM address A8

2mA

(SL)

AD9

Output

SDRAM address A9

2mA

(SL)

AD10

Output

SDRAM address A10

2mA

(SL)

AD11

Output

SDRAM address A11 for 64M SDRAM or BA for 16M

SDRAM

2mA

(SL)

AD12

Output

SDRAM address A12, BA0 for 64M SDRAM, unused

on 16M

2mA

(SL)

Table 15: STV0681 pin listing

Pin no.

Signal

Type

Description

drive

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