參數(shù)資料
型號: SAA7348GP
廠商: NXP SEMICONDUCTORS
元件分類: 微控制器/微處理器
英文描述: All Compact Disc Engine ACE
中文描述: 8-BIT, MROM, 35 MHz, MICROCONTROLLER, PQFP100
文件頁數(shù): 25/60頁
文件大?。?/td> 205K
代理商: SAA7348GP
1997 Jul 11
25
Philips Semiconductors
Preliminary specification
All Compact Disc Engine (ACE)
SAA7348GP
8.1.2
P
ORT
S
ERVO
R
EGISTER
(PSR)
The Port Servo Register is the internal bus used to communicate with the servo. The register is bit addressable; R/W.
The operation of the handshake bits used for serial communications with the servo is outlined in Table 12.
Table 10
Port servo register (address 0XD8H to 0XDFH)
Table 11
Description of PSR bits
Table 12
Servo serial communication handshake signals
7
6
5
4
3
2
1
0
Tray_en
Tray_pwm
Srv_rdy
Srv_dacc
Srv_sild
Srv_sicl
Srv_sida
Srv_intreqn
BIT
SYMBOL
ADDRESS
DESCRIPTION
7
6
5
4
3
2
1
0
Tray_en
Tray_pwm
Srv_rdy
Srv_dacc
Srv_sild
Srv_sicl
Srv_sida
Srv_intreqn
0XDFH
0XDEH
0XDDH
0XDCH
0XDBH
0XDAH
0XD9H
0XD8H
signal to enable tray driver
PWM signal to tray driver
RDY; see Table 12
DAC; see Table 12
SILD
SICL
SIDA
INTREQN
DAC
RDY
DESCRIPTION
0
0
0
1
transmit register full; the microcontroller can read a byte or send a new command
idle state, transmit register empty; the microcontroller can transmit a parameter relating
to the new command
received one byte, waiting for EOT
receive register full
1
1
0
1
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