SAA7185B Просмотр технического описания (PDF) - Philips Electronics
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SAA7185B Datasheet PDF : 36 Pages
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Philips Semiconductors
Digital Video Encoders (DENC2-M6)
Preliminary specification
SAA7184; SAA7185B
SYMBOL
CHROMA
VDDA2
Y
VSSA
CVBS
VDDA3
IOA
VDDA4
RES
DTACK
RWN/SCL
A0/SDA
CSN/SA
VSSD7
DP0 to DP3
VDDD3
SEL_MPU
PIN
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63 to 66
67
68
I/O
DESCRIPTION
O analog output of the chrominance signal
I
analog supply voltage 2 for the DACs and output amplifiers
O analog output of the luminance signal
−
analog ground for the DACs and output amplifiers
O analog output of the CVBS signal
I
analog supply voltage 3 for the DACs and output amplifiers
I
current input for the output amplifiers (connected via a 15 kΩ resistor to
VDDA)
I
analog supply voltage 4 for the DACs and output amplifiers
I
Reset input, active LOW. After reset is applied, all outputs are in 3-state input
mode. The I2C-bus receiver waits for the start condition.
O Data acknowledge output of the parallel MPU interface, active LOW,
otherwise high impedance.
I
If pin 68 (SEL_MPU) is HIGH, this is the read/write signal of the parallel MPU
interface. Otherwise it is the I2C-bus serial clock input.
I/O If pin 68 (SEL_MPU) is HIGH, this is the address signal of the parallel MPU
interface. Otherwise it is the I2C-bus serial data input/output.
I
If pin 68 (SEL_MPU) is HIGH, this is the chip select signal of the parallel
MPU interface. Otherwise it is the I2C-bus slave address select pin. When
LOW slave address = 88H, when HIGH slave address = 8CH.
−
digital ground 7
I/O Lower 4 bits of the data port; if pin 68 (SEL_MPU) is HIGH, the data bus of
the parallel MPU interface is used. If pin 68 is LOW, then the UV lines of the
video port are used.
I
digital supply voltage 3
I
Select MPU interface input; if it is HIGH, the parallel MPU interface is active,
if not the I2C-bus interface will be used.
1996 Jul 03
5
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