參數(shù)資料
型號: M30201F6
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
中文描述: 單片16位CMOS微機
文件頁數(shù): 138/159頁
文件大?。?/td> 2319K
代理商: M30201F6
Appendix Parallel I/O Mode
Peimnay
Unde
deeopmen
Mitsubishi microcomputers
M30201 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
138
The following explains about bus operation modes, software commands, and status register.
Bus Operation Modes
Read-only mode is entered by applying V
PPH
to the CNV
SS
pin and a low voltage to the V
RFY
pin.
Read-only mode has three states: Read, Output Disable, and Standby which are selected by
_____
_____
______
setting the CE, OE, and WE pins high or low.
Read-write mode is entered by applying V
PPH
to the CNV
SS
pin and a high voltage to the V
RFY
pin.
Read-write mode has four states: Read, Output Disable, Standby, and Write which are selected by
_____
_____
______
setting the CE, OE, and WE pins high or low.
Read
The Read mode is entered by pulling the WE pin high when the CE and OE pins are low. In Read
mode, the data corresponding to each software command entered is output from the data I/O pins
D
0
–D
7
.
______
_____
_____
Output Disable
The Output Disable mode is entered by pulling the CE pin low and the WE and OE pins high. Also,
the data I/O pins are placed in the high-impedance state.
_____
_____
_____
Standby
The Standby mode is entered by driving the CE pin high. Also, the data I/O pins are placed in the
high-impedance state.
_____
Write
The Write mode is entered by applying V
PPH
to the CNV
SS
pin and a high voltage to the V
RFY
pin
_____
_____
and then pulling the WE pin low when the CE pin is low and OE pin is high. In this mode, the device
accepts the software commands or write data entered from the data I/O pins. A program, erase, or
some other operation is initiated depending on the content of the software command entered here.
The input data such as address is latched at the falling edge of WE pin. The input data such as
software command is latched at the rising edge of WE pin.
_____
_____
_____
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