Diagrams; Explanation Of Ic Terminals - Sony Discman D-180AN Service Manual

6-1. EXPLANATION OF IC TERMINALS

IC801 MC68HC05L15SC442712CPB (SYSTEM CONTROL)
Pin No. Pin name
1 – 3 SEG 12–14
4 FP26
5 XRST– DSP
6 AMUTE – HP
7 DRV – MUTE – DRV
8 ESPON–PWR
9 DACLT–DAC
10 C2POEN
11 TEOADJ – TEO
12 RMDAT–WRMT
13 VLCD (GND)
14 VSS (GND)
15 NDLY (GND)
16 CHGON – PWR
17 PCON–PWR
18 XMCRST–PWR
19 OSC 1
20 OSC 2
21 SDT–ESP
22 SDT–ESP
23 SCK–ESP
24 XBBSW – DBB
25 XLT–ESP
26 HOLD–SW
27 XLMT–MD
28 XRSM–SW
29 WP XDC–DT PWR
30 WP XOPEN–SW
31 WP XPLAY–SW
32 WP RMKEY WRMT
33 XL/O DCT
34 XRCHG–SW
35 XAVLS–SW
36 R/W DSP
37 SDT–DSP
38 SDT–DSP
39 SCK–DSP
40 FOK–RF
SECTION 6

DIAGRAMS

I/O
O LCD segment signal output terminal.
– Not used (Open).
O Reset output terminal.
O Audio mute output terminal.
O Mute drive output.
– Not used (Open).
I/O CPU serial data input, latch signal output (For DAC only).
– Not used (Open).
O Tracking ADJ switch control output.
– Not used (Open).
– Connect to ground.
– Connect to ground.
– Connect to ground.
O Charge ON/OFF control output.
O Power ON/OFF control output. " L " : ON " H " : OFF
I System reset input terminal.
I System clock oscillator input terminal (4.1943 MHz).
O System clock oscillator output terminal (4.1943 MHz).
– Not used (Open).
– Not used (Open).
– Not used (Open).
O DBB switch control output.
O Latch signal output to ESP control (IC601).
I Hold switch input terminal. " L " : HOLD ON
I Limit switch input terminal. " L " : Inside Track
I RESUME switch input terminal. " L " : ON
I DC in voltage detection terminal.
I Door open switch input terminal. " L " : Close " H " : Open
I Play/pause key input terminal.
– Not used (Open).
I LINE OUT jack detection terminal. " L " : Present " H " : No
I Rechargeable battery detection terminal. " L " : Present
I AVLS switch input terminal.
O Read/Write switching signal output terminal. " L " : Read " H " : Write
I SUB–Q signal input terminal.
O Serial data output to DSP (IC502) and D/A converter (IC301).
O Clock signal to enter SUB–Q signal to DSP (IC502) and D/A converter (IC301).
I FOK signal input terminal.
– 11 –
Description
" H " : HOLD OFF
" H " : OFF
" H " : No