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參數(shù)資料
| 型號： | SAA7390GP |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | High performance Compact Disc-Recordable CD-R controller |
| 中文描述： | 高性能式光盤CD - R光盤控制器 |
| 文件頁數(shù)： | 56/76頁 |
| 文件大?。?/td> | 366K |
| 代理商： | SAA7390GP |
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1996 Jul 02
56
Philips Semiconductors
Preliminary specification
High performance Compact
Disc-Recordable (CD-R) controller
SAA7390
15.5
S2B interface timing
The S2B serial interface consists of four lines (see Fig.19):
Transmit data (TXD)
Receive data (RXD)
Data path ready to accept data; active LOW (CPR)
Basic engine ready to accept data; active LOW (SPR).
These are used for communication. TXD and CPR for
sending acknowledges and information data to the data
path and RXD and SPR for receiving commands and
parameters from the data path. The data is transferred
frame-wise and asynchronously.
A data frame is proceeded by a start-bit (active LOW),
followed by the actual data byte, and again followed by a
parity bit (even parity), and a stop bit (active HIGH),
see Fig.20. In total, eleven bits per frame are incorporated.
The interface is full duplex, meaning data frames may be
transmitted and received simultaneously.
The bit-rate is selectable:
187.5 kbits/s with a 2.6% error
62.5 kbits/s with a 0.4% error
31.25 kbits/s with a 0.4% error.
Fig.19 S2B interface.
handbook, halfpage
MGE403
RXD
data path
sequoia
basic engine
CPR
TXD
SPR
TXD
CPR
RXD
SPR
Fig.20 S2B Timing.
handbook, halfpage
MGE404
S0
0
1
2
3
4
5
6
7
P
S1
CPR
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