Explanation Of Ic Terminals "++-0++-0+0:-00000000 - Sony TC-WR535 Service Manual

SECTION 4
EXPLANATION OF IC TERMINALS
Terminal explanation
External interrupt request
input pines. (4 lines)
IC801 CXP82316-017Q
REC OUT
Timer/counter extemal event
input pins .(2 lines)
Remote control reception circuit input pin.
(Port E)
An 8-bit port of which the
lower 6 bits are an input-only
port and the upper 2 bits are
an output-only port. (8lines)
Output pin for serial data (CHO)
(Port B)
The lower seven bits are an
input/output port for which
each bit can be set for input or
output independently.
The uppermost bit (PB7) is
output only. (8 lines)
l/O
SELECT 1332/s
Input/output pin for serial clock (CHO)
Input pin for serial data (CH1)
Output pin for serial data (CH1)
REC/PB
Ti recat
[is [crear
Da [crea
ps [are |
es
ee
Pa [es
Ca [Kee
Das [evi
pas [ vere _|
a [serene
— io)
(Port C)
8-bit input/output port for
which each bit can be set for
input or output independently.
Can drive a 12mA sync
current.
Key return input pins for key scanning with FDP segment
signals
(Port A)
8-bit input port; each bit can
be set for input or output
independently. (8 lines)
Eight A/D converter analog input pins.