7
SCLK
I
Serial clock
15
FILT+
I
Positive voltage
reference
8
LRCK
I
Left right clock
16
M1
I
Mode selection 1
3.5.4 function introduction to 74HCU04
1. Description
The 74HCU04 (U205) is a high-speed Si-gate CMOS device and is pin compatible with low power
Schottky TTL (LSTTL). It is specified in compliance with JEDEC standard no. 7A.
The 74HCU04 is a general purpose hex inverter. Each of the six inverters is a single stage
2. Features
◆
Output capability: Standard
◆
ICC category: SSI
3. PIN CONFIGURATION
PIN NO.
SYMBOL
I/O
Description
1, 3, 5, 9, 11, 13
1A to 6A
I
data inputs
2, 4, 6, 8, 10, 12
1Y to 6Y
O
data outputs
7
GND
ground (0 V)
14
VCC
positive supply voltage
3.5.5 Function introduction to FLASH
1.
DESCRIPTION
FLASH (U207) is a 16Mbit FLASH memorizer, and the damage of U214 may cause troubles, such as
power not on, no disc reading and power on picture mosaic.
2.
PIN DESCRIPTION
Pin
Name
Function
Voltage (when no disc)
Data direction
1-9
、
16-25
、
48
AO-A19
20 bit address bus
I
11
WE
Write enable signal, low level is effective
3.23V
I
12
RESET
Reset, low level is effective
3.23V
I
10
、
13
、
14
NC
Blank pin
15
RY/BY
Ready/system busy
3.23V
O
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