32170 datasheet(10/49 Pages) MITSUBISHI

No de pièce	32170

Description	SINGLE-CHIP 32-BIT CMOS MICROCOMPUTER

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Fabricant	MITSUBISHI [Mitsubishi Electric Semiconductor]

Site Internet	http://www.mitsubishichips.com

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10 / 49 page

Mitsubishi Microcomputers

10

2001-5-14 Rev.1.0

SINGLE-CHIP 32-BIT CMOS MICROCOMPUTER

32170 Group, 32174 Group

Table 5 Description of Pin Function (1/5 )

Type

Pin Name

Description

Input/Output

Function

Power

VCCE

Power supply

—

Supplies power (5 V or 3.3V) to external I/O ports.

supply

VCCI

Power supply

—

Supplies power (3.3 V) to the internal logic.

VDD

RAM power supply

—

nternal RAM backup power supply (3.3 V).

FVCC

Flash power supply —

Internal flash memory backup power supply (3.3 V).

VSS

Ground

—

Connect all VSS pins to ground (GND).

Clock

XIN,

Clock

Input

Clock input/output pins. These pins contain a PLL-based

XOUT

Output

frequency multiply-by-4, so input the clock whose frequency is quarter

the operating frequency. (XIN input = 10 MHz when CPU clock operates

at 40 MHz)

BCLK /

System clock

Output

When this signal is System Clock(BCLK), it outputs a clock whose is twice that of

______

WR

external inpout clock. (BCLK output = 20 MHz when CPU clock operates at 40

MHz). Use this clock when circuits are synchronized externally.

______

When this signal is Write(WR),during external write access it indicates the valid

data on the data bus to transfer.

OSC-VCC

Power supply

—

Power supply to the PLL circuit. Connect OSC-VCC to the power supply(3.3V)

OSC-VSS

Ground

—

Connect OSC-VSS to ground.

VCNT

PLL control

Input

This pin controls the PLL circuit. Connect a resistor and capacitor to this pin.

Reset

______

RESET

Reset

Input

This pin resets the internal circuits.

Mode

MOD0

Mode

Input

These pins set an operation mode.

MOD1

MOD0

MOD1

Mode

0

Single-chip mode

0

1

Expanded external mode

1

0

Processor mode

0

(Boot mode) (Note)

1

(Reserved)

Address

A11-A30

Address

Output

20 lines of address bus (A11-A30) are provided to accommodate two

bus

channels of 2 MB memory space (max.) connected external to the chip.

A31 is not output.

In the write cycle, of the 16-bit data bus the valid byte positions to write are

_________ ________

________ _______

output as BHW/ BHE and BLW/ BLE. In read cycle, data on the entire 16-bit

data bus is read. However, only the data at the valid byte positions are

transferred to the M32R’s internal circuit.

Data bus

DB0-DB15

Data bus

Input/output

This 16-bit data bus connects to external device.

Note: FP pin should be “H” level in Boot Mode.

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