參數(shù)資料
型號: M37640E8
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 8-BIT CMOS MICROCONTROLLER
中文描述: 單芯片8位CMOS單片機
文件頁數(shù): 53/172頁
文件大?。?/td> 1193K
代理商: M37640E8
7600 Series
Mitsubishi Microcomputer
M37640E8-XXXF Preliminary Specification
Input and Output Ports
7/9/98
2-41
2.7.1.7
RDY Pin
The P3
0
/RDY pin is used to control the slow memory wait function of the MCU. For a detailed
description of this pin, see section 2.5.5 on page 2-19.
2.7.1.8
DMAout Pin
When the chip is in microprocessor or memory expansion mode, the DMAout (P3
3
/DMAout) pin goes
high during a DMA transfer.
2.7.1.9
Φ
out
Pin
When the MCU is in microprocessor or memory expansion mode, pin P3
4
outputs the internal system
clock
Φ
out
. When the STP or WIT instructions are executed, the output of the
Φ
out
pin stops at a high
level.
2.7.1.10
SYNC
out
Pin
When the MCU is in microprocessor or memory expansion mode, the SYNC
out
pin outputs a signal
that is high for one-half cycle of
Φ
out
every time an OpCode is fetched.
2.7.1.11
RD and WR Pins
When the MCU is in microprocessor or memory expansion mode, a read control signal is output from
the RD pin and write control signal is output from the WR pin (P3
6
/WR and P3
7
/RD). A low output
from the RD pin indicates that the CPU is reading and a low output from the WR pin indicates that
the CPU is writing. These signals are active for both internal and external accesses.
2.7.1.12
LPF Pin
When the Frequency Synthesizer is active, the LPF pin is the loop filter for the Frequency Synthesizer.
2.7.1.13
USB D+/D- Pins
These two pins are used as the data transmission/reception lines for the USB core.
2.7.1.14
Ext. Cap Pin
When the USB transceiver voltage converter is used, an external capacitor must be connected to this
pin.
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