TH-A30
1-26
74HCT245 (U15) : Transceiver
1.Pin layout
2.Truth table
G
DIR
245
L
L
L
H
H
X
Control
Inputs
Operation
B data to A bus
A data to B bus
isolation
H
=
HIGH Level
L
=
LOW Level
X
=
Irrelevant
20 19 18 17 16 15 14 13 12 11
1 2 3 4 5 6 7 8 9 10
Vcc G B1 B2 B3 B4 B5 B6 B7 B8
DIR A1 A2 A3 A4 A5 A6 A7 A8 GND
ENABLE
M5705 (DU3) : DVD-ROM controller
1.Block diagram
M
Motor
Driver
ROM
4M DRAM
Data
Separator
CD-DSP
Digital
Servo
Target
Search
RAM
Arbiter
ATAPI
&
MPEG
I/F
MCU
PC
RF
Amp
C3 ECC
EDC
M5703/M5707
MPEG
DEC.
DVD-DSP
Содержание TH-A30
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