3 - 2
Pin Name I/O Description
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70 *SPPOL O Spindle motor drive signal output (Polarity output)
71 PMCK O 88.2-KHz clock signal output
72 *NCLDCK O Frame sync signal output f=7.35kHz (Normal-speed playback)
73 *SUBC O Subcode serial output
74 *SBCK I Subcode serial output clock input
75 NTEST I Test input pin Normal: H
76 X2 O Crystal oscillator output pin f=16.9344 MHz
77 X1 I Crystal oscillator input pin f=16.9344 MHz
78 DVSS1 I Ground for digital circuits
79 DV
DD1 I Power supply for digital circuits
80 *EXT2 I Expansion I/O part 2
AN41502– DC-DC CONVERTER AND 4-CHANNEL PWM DRIVER
Pin Name Description
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1 EMP Low battery detection output
2 RESET Reset output
3 OFF DDC turning off
4 PREGND Ground for control circuit block
5 EO Step-up/down DDC error amplifier output
6EI Step-up/down DDC error amplifier input
7SVCC Step-up/down DDC error supply output
8 CRP Ripple filter capacitor output
9AVCC Ripple filter connection
10 VSUBIN Sub DDC error amplifier input
11 VSUB Sub DDC power supply output
12 SSW Sub DDC coil drive
13 SVCCF Step-up/down DDC power supply
14 USW Step-up/down DDC coil drive 2
15 PGND1 Ground for power supply block1
16 DSW Step-up/down DDC coil derive 1
17 PV
CC1 Battery power supply input
18 VSEN Battery voltage detection input
19 START DDC startup
20 LG V
G voltage step-up coil drive
21 VG Gate drive power supply
22 REGB REG transistor drive
23 PVCC2 AC adapter power supply input
24 VCNT Setting PV
CC1 for charging
25 FO4 Ch.4 forward output
26 RO4 Ch.4 reverse output
27 DRGND2 Motor ground 2
28 FO3 Ch.3 forward output
29 RO3 Ch.3 reverse output
30 V
M Motor power supply
31 RO2 Ch.2 reverse output
32 FO2 Ch.2 forward output
33 DRGND1 Motor ground 1
34 RO1 Ch.1 reverse output
35 FO1 Ch.1 forward output
36 MON V
M monitoring
37 FI1 Ch.1 forward input
38 RI1 Ch.1 reverse input
39 FI2 Ch.2 forward input
40 RI2 Ch.2 reverse input
41 FI3 Ch.3 forward input
42 RI3 Ch.3 reverse input
43 FI4 Ch.4 forward input
44 RI4 Ch.4 reverse input
45 CLK DDC external clock input
46 SOFT Soft start setting
47 CT Triangular wave output
48 SPRT Power off time constant setting
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