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M37640E8FP

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Mitsumi 

Ver 1.4

MITSUBISHI MICROCOMPUTERS

7640 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

NAME

P73/IBF1/HLDA

P74/OBF1

P80/UTXD2/SRDY

P81/URXD2/SCLK

P82/CTS2/SRXD

P83/RTS2/STXD

P84/UTXD1

P85/URXD1

P86/CTS1

P87/RTS1

AVcc, AVss

CNVss/Vpp

Vcc,Vss

RESET

XCin

XCout

Xin

Xout

LPF

Ext. Cap

I/O

DESCRIPTION

CMOS I/O port or IBF1 output to master CPU for data bus buffer 1, or HLDA pin.

I/O IBF1 and HLDA are mutually exclusive. IBF 1 has priority over HLDA

I/O CMOS I/O port or OBF1 output to master CPU for data bus buffer 1.

CMOS I/O port or UART2 pin UTXD2 or SIO pin SRDY. UART2 and SIO are

I/O mutually exclusive, UART2 has priority over SIO.

CMOS I/O port or UART2 pin URXD2 or SIO pin SCLK. UART2 and SIO are

I/O mutually exclusive, UART2 has priority over SIO.

CMOS I/O port or UART2 pin CTS2 or SIO pin SRXD. UART2 and SIO are

I/O mutually exclusive, UART2 has priority over SIO.

CMOS I/O port or UART2 pin RTS2 or SIO pin STXD. UART2 and SIO are

I/O mutually exclusive, UART2 has priority over SIO.

I/O CMOS I/O port or UART1 pin UTXD1.

I/O CMOS I/O port or UART1 pin URXD1.

I/O CMOS I/O port or UART1 pin CTS1.

I/O CMOS I/O port or UART1 pin RTS1.

I Power supply inputs for analog circuitry AVcc = 4.15~ 5.25V, AVss = 0V

Controls the processor mode of the chip. Normally connected to Vss or Vcc.

I When the MCU is in EPROM program mode, this pin supplies the programming

voltage to the EPROM.

I Power supply inputs: Vcc = 4.15~ 5.25V, Vss = 0V

To enter the reset state, this pin must be kept 'L' for more that 2µs (20 Φ cycles

I under normal Vcc conditions). If the crystal or ceramic resonator requires more

time to stabilize, extend this 'L' level time appropriately.

I An external ceramic or quartz crystal oscillator can be connected between the

O

XCin and XCout pins. If an external clock source is used, connect the clock

source to the XCin pin and leave the XCout pin open.

Input and output signals to and from the internal clock generation circuit.

I Connect a ceramic resonator or quartz crystal between Xin and Xout pins to set

O the oscillation frequency. If an external clock is used, connect the clock source

to the Xin pin and leave the Xout pin open.

O Loop filter for the frequency synthesizer.

An external capacitor (Ext. Cap) pin. When the USB transceiver voltage

I converter is used, a 2µf or larger capacitor should connect between this pin and

Vss to ensure proper operation of the USB line driver. The voltage converter is

enabled by setting bit 4 of the USB control register (001316) to a “1”.

PIN #

66

65

32

31

30

29

28

27

26

25

17,19

9

16/74

13/73

10

12

11

14

15

18

72

4

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