參數(shù)資料
型號(hào): HD49235FS
廠商: Hitachi,Ltd.
元件分類: 數(shù)字信號(hào)處理
英文描述: Digital Signal Processor for CD
中文描述: 數(shù)字信號(hào)處理器的CD
文件頁數(shù): 3/41頁
文件大小: 192K
代理商: HD49235FS
HD49235FS
Rev.2, Aug. 1995, page 3 of 41
Pin Description
Pin
Polarity
No.
Symbol
Name
I/O*
Connection
Function
H
L
1
XRST
X (μ-com)
reset
I
Microprocessor Microprocessor interface
register reset
Reset
2
CNIN
Counter clock
input
I
Servo IC
Pulse input for track counter
3
SENS
Sensor
TO
Microprocessor Servo status output
4
DATA
Data
I
Microprocessor Data input for microprocessor
interface
5
CLK
Clock
I
Microprocessor Clock input for microprocessor
interface
6
XLT
X (μ-com) latch I
Microprocessor Strobe input for
microprocessor interface
7
V
SS
(D)
OVFW
V
SS
(digital)
RAM- overflow O
Digital ground
8
On-chip RAM overflow signal
output
Overflow
9
S1
Subcode sync
1
O
Microprocessor Subcode sync signal
(with protection)
10
QOK
Q-code OK
O
Microprocessor Subcode CRC result output
OK
NG
11
QDATA
Q-code data
O
Microprocessor Subcode Q data output
12
CKEXT
Clock-EXT
I
Microprocessor Clock input for Q data readout
13
SUBOUT Subcode out
O
CD graphics
Subcode data output for CD
graphics
14
SUBCK
Subcode clock I
CD graphics
Clock input for SUBOUT
subcode readout
15
CFCKP
C&D frame
clock out
O
CD graphics
Subcode frame
synchronization signal (7.35
kHz at normal speed,
synchronized with PLL)
16
EMP
Emphasis
output
O
Emphasis on/off status output
ON
OFF
17
BIDAT
Biphase date
TO
Digital audio interface output
18
MUTE
Mute
I
Microprocessor Audio mute input
Mute
19
DAS
Data serial out O
DAC or ROM
decoder
Serial data output for audio or
ROM
20
CKX
Clock X
O
DAC or ROM
decoder
Strobe clock output for DAS
signal
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