44
KEH-P4800,P4850
-
Pin Functions (PD6278A)
Pin No.
Pin Name
I/O
Function and Operation
1-5
SEG4-0
O
LCD segment output
6-9
COM3-0
O
LCD common output
10
V3
LCD drive power supply
11-14
KS4-1
O
Key strobe output
15,16
KD1,2
I
Key data input (analogue input)
17
REM
I
Remote control reception
18
RXD
I
System micro computer UART communication data input
19
rst
I
System reset
20
TXD
O
System micro computer UART communication data output
21
MODA
GND
22
X0
Crystal oscillator connection pin
23
X1
Crystal oscillator connection pin
24
VSS
GND
25,26
KD3,4
I
Key data input
27,28
KS6,5
O
Key strobe output
29-55
SEG39-13
O
LLCD segment output
56
VCC
Power supply
57-64
SEG12-5
O
LCD segment output
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Vref
IN1_L
IN2_L
IN3_L
IN4+_L
AGND Loud-
out_L
SVin_L
Front-
out_L
Rear-
out_L
FIE_L
DGND
IN4-_L
CLK
VCC
IN1_R
IN2_R
IN3_R IN4+_R
AGND
Loud-
out_R
SVin_R
Front-
out_R
Rear-
out_R FIE_R
STB
IN4-_R
DATA
Isolator
circuit
Primary
volume
Anti Alias
filter
Treble
Anti radiation
filter
Middle
Bass
Loudness
volume
FIE
Fader
volume
Secondary
volume
Zero cross
detect circuit
Primary
volume
Anti Alias
filter
Middle
Treble
Bass
Isolator
circuit
Anti radiation
filter
Loudness
volume
Zero cross
detect circuit
Fader
volume
Secondary
volume
FIE
Digital block
Auto-Zero
Auto-Zero
PML003AM
Summary of Contents for KEH-P4800
Page 2: ...4 KEH P4800 P4850 2 2 EXTERIOR ...
Page 13: ...15 KEH P4800 P4850 5 6 7 8 A B C D 5 6 7 8 B ER UNIT IFC A ...
Page 15: ...ER UNIT IFC 17 KEH P4800 P4850 5 6 7 8 A B C D 5 6 7 8 B A ...
Page 16: ...18 KEH P4800 P4850 A 1 2 3 4 B C D 1 2 3 4 CAW1543 3 3 KEYBOARD UNIT C ...
Page 30: ...41 KEH P4800 P4850 7 GENERAL INFORMATION 7 1 PARTS 7 1 1 IC CXA2559Q ...
Page 34: ...45 KEH P4800 P4850 7 1 2 DISPLAY CAW1543 COMMON SEGMENT ...
Page 35: ...47 KEH P4800 P4850 7 3 BLOCK DIAGRAM B A D F E C ...
