— 8 —
Pin No.
Terminal Name IN/OUT
Function
85, 86
AVCC, AVREF
IN
Connected to VCC3.
87 - 89
PC0 - PC2
IN
Key input terminal.
90
PC3
IN
Low battery detection terminal.
91
AVSS
IN
Ground terminal.
92 - 95
PC4 - PC7
-
Not used.
96
VSS
IN
Power source.
97, 98
PB0, PB1
IN/OUT Port B.
99
VCC
IN
Power source.
100 - 105
PB2 - PB7
IN/OUT Port B.
106
VSS
IN
Ground terminal.
107
RXDO
IN
Data input terminal from a personal computer.
108
TXDO
OUT
Data output terminal to a personal computer.
109, 110
PB10, PB11
IN/OUT Port B.
111
PB12
-
Not used.
112
PB13
-
Not used.
Data Compressor
The color difference and the luminance data is compressed about 1/7 to increase the
numer of images in memory. Up to 96 images can be stored.
Y (luminance siganal) data : 480 x 224 byte
Cb (color difference signal B-Y) data
: 160 x 112 byte
21,120 byte
Cr (color difference signal R-Y) data : 160 x 112 byte
1/7
Total: 143,360 byte 21,120 byte
Control
Timing
Data
Compressor
V RAM
Control
Encoder
D/A
V RAM
Encoder
The color and the luminance data are mixed internally to make the video signal, and
send it to the linear PCB and the video out terminal.
2
Gate Array (IC700)
Summary of Contents for KX-724B
Page 1: ...R QV 30 B KX 724B APR 1996 without price For NTSC...
Page 38: ...37 KEY Battery To Digital PCB...
Page 40: ...MA0500361A...
