11
VOSL-
Main shaft drive inverse voltage output
12
VO2+
Main shaft forward voltage output
13
VOFC-
Focusing drive inverse voltage output
14
VOSC+
Focusing drive forward voltage output
15
VOTK+
Tracking drive forward voltage output
16
VOTK-
Tracking drive inverse voltage output
17
VOLD+
Feed drive forward voltage output
18
VOLD-
Feed drive inverse voltage output
19
PGND
Grounding
20
VINFTK
Tracking feedback signal input
21
PVCC2
5V voltage
22
PREGND
Grounding
23
VINLD
Feed control signal input
24
CTK2
External feedback loop
25
CTK1
External feedback loop
26
VINTK
Tracking control signal input
27
BIAS
1.4 reference voltage input
28
STBY
Enabling control signal
III. 29LV160BE
29LV160BE is a type of 16Mbit FLASH memory manufactured via 0.23um technology, with 16
byte width DQ0-DQ15, memory capacity of 16M bit, operation voltage of 3.3V, and packaging
method of 48 pins TSOP. The specific operation mode is as the following table:
DQ8~DQ15
Operation
status
CE
OE
WE
RESET
A0~A19
DQ0~QD7
BYTE
:
high
level
BYTE: Low
level
Read
L
L
H
H
Ain
Dout
Dout
High resistance
Write
L
H
L
H
Ain
Din
Din
High resistance
Waiting
H
×
×
H
×
high
resistance
high resistance
high resistance
Output
forbidden
L
H
H
H
×
High
resistance
High resistance
High resistance