Sony CFD-K10 Service Manual page 69

CFD.KlO
.tc801 cxP5078-057Q
Pin No. Na me
t/o
Pin Descriptio n
l-3
PORT Gi
SEGMENT
o
Terminals used as 4-bit output-only port loutput format same as port C) and for LCD
segment signal output.
4-19 SEGMENT
o
LCD segment signal output terminals.
20-23
COMMON
o
LCD common signal output terminals.
24-26 VLC I-VLC 3
LCD bias power supply terminals.
27 V L
o
Control terminal for cutting off current flow to external LCD bias resistor during standby
status.
28
RMIN
I Remote control receiver circuit input terminal.
29
INT (SCOR)
I
Interrupt input terminal. Allows selection of edge mode or level mode through program-
ming.
30
XTAL
o
Clock generator circuit output
EXTAL I
Clock generator circuit input terminal. A quartz oscillating element cir ceramic resonator
is connected between EXTAL and XTAL. To us€ external clock input, connect the clock
oscillator source to the EXTAL terminal and leave the XTAL terminal open.
32
RST
vo
Output of internal power-on reset circuit. When inputting an external res€t signal, it
should be maintain at "L" (0V) for at least two command cycles.
J J
NC
(Not used)
34
VDD Positive power supply terminal.
35-38
PORT I/
ANALOG
VOLTAGE
INPUT
r/o
This 4-bit I/O port has the same functions as port C. Also used for A/D converter input.
39, 40 PORT E
vo
This 4-bit I/O oort has the same functions as Dort A. Also used for A/D converter inDut. 4 1 CD
42 STANDBY
43 NC
(Not used)
4 4
SQCK
r/o
Used as both shift clock I/O terminal for serial I/O and as bit "0" (input) for port X.
45
DATA
r/o
Used as both serial data I/O terminal for serial I/O and as bit "1" (input) for port X.
(Can be programmed to prohibit SO output.)
46 SUBQ
I
Used as both serial interface (8-bit) input terminal and as bit "2" (input) for port X.
47 XLT
t/o
48 BTL MUTE
I hls 4-brt l/u port allows rndlvldual blts to De programmed as lnput or oulput. I he output
^ - r . L ^ ^ . . 1 1 . . ^ - ^ ^ : ^ + ^ - ^ - - L ^ ^ ^ a f - ^ ^ ^ t ^ ^ L ^ , . - ^ l
49 DRIC
a r r u l r r ç
P u r r - u l J
a standby cancel terminal.
50
EJECT
51 LEADER
vo
This 4-bit I/O port has the same functions as port C.
q t
REVERSE
53 PAUSE LED
54 REC
55 GFS
vo
This 4-bit I/O port can be programmed as either input or output. The output format has
56 FOK
SENSE
three states and the pull-up resistor can be programmed.
58 HI SPEED
)v
MUTE
o
Port Y bit "0" outout terminal.
60
BW
o
Terminal used as both PWM generator (14-bit) output and port Y bit "1" (output).
o l
WUP
I
Terminal used for both wake-up input to cancel standby status and port Y bit "2" (input).
62 RVYR OFF I
Used as both event counter (8-bit) input terminal and port Y bit "3" (input).
- 2 5 -