SPCA701A 查看數據表（PDF） - Unspecified

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SPCA701A

DIGITAL VIDEO ENCODER FOR VIDEOCD

Unspecified 

Preliminary

SPCA701A

Mnemonic

CVBSC

VBIAS

VDD

DGND

VAA

AGND

PIN No.

11

10

31

30

7

3,12

Type

Description

directly to GND.

O Composite/Chroma output. This is a high impedance current source

Output. The output format can be selected by the PAL pin. The pin

can drive a 37.5 load. If unused, this pin must be connected directly

to GND.

- DAC bias voltage. Potential normally 0.7V less than COMP.

- Digital power pin

- Digital ground pin

- Analog power pin

- Analog ground pin

MODE SELECTION

Master mode is selected when MASTER = 1; slave mode is selected when MASTER = 0. Two pins, MODE

[3:2], drive three different configuration registers. The most common operating modes can be selected with

these pins while in master mode. In slave mode, the common operating modes are automatically determined

from the timing of the incoming HSYNC* and VSYNC* signals.

NOTE: The term “common operating mode” refers to North American NTSC and Western European PAL Table

2 illustrates the multi-functionality of the mode pins during master and slave mode. To access the more

exotic video formats, slave mode is preferred since the necessary registers are always accessible. If

master mode is needed, the less common modes can still be programmed by first registering the modes

as a slave, and then switching to a master. During power-up, the MODE [3:2] pins configure the master

registers; i.e., EFIELD, PAL625, are written. Also, during power-up, the slave registers are reset to zero,

i.e., YCSWAP.

Table 2. Mode Selection

The MASTER pin

0

1

PIN Description

MODE[3]

MODE[2]

YCSWAP

---

EFIELD

PAL625

MODE[1]

---

---

MODE[0]

---

---

Sunplus Technology Co., Ltd.

3

Rev.: 0.2 1999.12.07

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