SM9403BM Datasheet, PDF (3/18 Pages) Nippon Precision Circuits Inc – DVDRAM Servo-amplifier LSI

SM9403BM
PIN DESCRIPTION
Number
Name
I/O¹
Function
1
NC
O No connection
2
NC
O No connection
3
FER
O Focus error signal output
4
FHOLD
– Focus error hold capacitor connection
5
FSUB
I Focus error signal input
6
ISET
I DPD signal equalizer, reference current set resistor connection
7
DPDD
I DPD signal input D
8
DPDC
I DPD signal input C
9
DPDB
I DPD signal input B
10
DPDA
I DPD signal input A
11
AGND
– Analog circuit ground
12
MMTI
I Mono-multivibrator time-constant set resistor connection
13
CAPA N
I ID data signal differential inverting input
14
C A PA P
I ID data signal differential non-inverting input
15
CAPLFC
– Slice-level detect capacitor connection
16
TSUB
I Tracking error signal input
17
THOLD
– Tracking error hold capacitor connection
18
TRE
O Tracking error signal output
19
VREF4
O 4V reference voltage output
20
VREF2
O 2V reference voltage output
21
TROFF
O Off-track detect signal output. LOW when off-track.
22
TRP
O Track count pulse output. HIGH-level pulse for land to outer tracking.
23
C A PA R E A
O ID interval detect signal output. ID interval detected when HIGH.
24
CAPOUT
O Outer offset ID detect signal output. Outer offset ID interval detected when HIGH.
25
AVCC
– Analog circuit power supply
26
CAPIN
O Inner offset ID detect signal output. Inner offset ID interval detected when HIGH.
27
CAPSEL
Ipd ID interval signal input. ID interval selected when HIGH.
28
CAPSEEK
Ipd Seek operation signal input. Seek operation selected when HIGH.
29
DVCC
– Logic circuit pow er supply
30
SENB
I Serial interface enable input. Enabled when HIGH.
31
S DATA
I/O Serial interface data input/acknowledge output
32
SCLK
I Serial interface clock input
33
DGND
– Logic circuit ground
34
DEFECT
Ipd Defect position signal input. Defect position indicated when HIGH.
35
DPDI
I DPD signal hold delay set resistor connection
36
DPDG
I DPD signal phase difference to voltage converter coefficient set resistor connection
1. I = input, Ipd = Input with built-in pull-down resistor, I/O = input/output (N-channel open-drain when output), O = output
NIPPON PRECISION CIRCUITS—3