45 DQ15/A-1
Take word extend mode as data line, and bit
extend mode as address line
I/O
47 BYTE
Select 8-bit or 16-bit output mode. High level is
16-bit output and low level is 8-bit output
I
3.5.4 Function introduction to D5954
D5954 is a servo drive IC with built-in 4-channel drive circuit. Digital focus, trace, feed and main axis drive
signal outputted by MT1389 is sent to D5954 for amplifying through RC integration circuit. The focus, trace,
feed and main axis drive signal being amplified by D5954 is sent to MT1389 to fulfil the
Pin Name Function
Voltage when
no disc (V)
DVD disc
voltage (V)
(V)
1 VINFC Focus control signal input 1.41 1.4 1.45
2 CF1 External feedback loop 2.3 2.54 2.43
3 CF2 External feedback loop 2.01 2.56 2.43
4 VINSL+ Forward control input,
connected to reference voltage
1.41 1.42 1.42
5 VINSL- Main axis control signal input 1.4 1.42 1.42
6 VOSL External feedback resistor 1.4 1.17 1.21
7 VINFFC Focus feedback signal input 1.92 2.59 2.36
8 VCC 5V power supply 5.38 5.04 5.01
9 PVCC1 5V power supply 5.38 5.04 5.03
10 PGND Ground 0.01 0.01 0.01
11 VOSL- Main axis drive reverse voltage output 1.87 3.71 3.54
12 VO2+ Main axis drive forward direction voltage output 1.87 1.24 1.4
13 VOFC- Focus drive reverse voltage output 3.3 2.6 2.33
14 VOSC+ Focus drive forward voltage voltage output 3.3 2.46 2.68
15 VOTK+ Trace drive forward direction voltage output 3.39 2.56 2.51
16 VOTK- Trace drive reverse voltage output 3.52 2.48 2.51
17 VOLD+ Feed drive forward direction voltage output 0.93 2.56 2.5
18 VOLD- Feed drive reverse voltage output 0.93 2.59 2.62
19 PGND Ground 0.01 0.01 0.01
20 VINFTK Trace feedback signal input 3.73 2.5 2.53
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