參數(shù)資料
型號: UPD6708GS
廠商: NEC Corp.
英文描述: IEBusa Inter Equipment Busa PROTOCOL CONTROL LSI
中文描述: IEBusa設備布薩間協(xié)議控制大規(guī)模集成電路
文件頁數(shù): 24/72頁
文件大?。?/td> 292K
代理商: UPD6708GS
24
μ
PD6708
4.2.1
Switching through pin control
With bits 5 and 4 of CMR both ‘0’, the host interface mode can be switched by setting the C/D pin and R/W pin to the
values shown in Table 4-4.
Table 4-4. Switching Host Interface Mode by Pin Control
C/D
R/W
Host Interface Mode
0
0
Data write mode
0
1
Data read mode
1
0
Command write mode
1
1
Status read mode
Figure 4-1. Example of Host Controller Connections by Pin Control
Caution If the power supply voltage moves out of the 5 V
±
5 % range, the RESET pin must be driven low for 6
μ
s
or more in order to reset the
μ
PD6708.
IEBus
120
120
5 V
12 MHz
5 V
Power Supply
Voltage Detection
Circuit
PD6708
μ
V
DD
AV
DD
BUS+
BUS–
XI
XO
GND
TEST
SCK
SI
SO
IRQ
C/D
R/W
CS
RESET
SCK
SO
SI
INT
Port
Port
Port
Host Controller
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