R5F36CAMDFB datasheet(13/94 Pages) RENESAS

13 / 94 page

REJ03B0277-0100 Rev.1.00 Jul.15, 2009

Page 11 of 90

M16C/6C Group

1. Overview

1.5

Pin Functions

Power supply: VCC2 is used to supply power to the external bus associated pins. The dual power supply configuration

allows VCC2 to interface at a different voltage than VCC1.

Note:

VCC means VCC1 except as otherwise noted.

Table 1.6

Pin Functions (1/3)

Signal Name

Pin Name

I/O

Power Supply

Description

Power supply

input

VCC1,

VCC2, VSS

I-

Apply 2.7 to 5.5 V to pins VCC1 and VCC2 (VCC1

≥ VCC2).

Input 0V to VSS.(1)

Analog power

supply input

AVCC, AVSS

VCC1

This is the power supply for the A/D converter. Connect the

AVCC pin to VCC1, and connect the AVSS pin to VSS.

Reset input

RESET

VCC1

Driving this pin low resets the MCU.

CNVSS

VCC1

Input pin to switch processor modes. After a reset, to start

operating in single-chip mode, connect the CNVSS pin to

VSS via a resistor. To start operating in microprocessor

mode, connect the pin to VCC1.

Bus control pins

D0 to D7

I/O

VCC2

Inputs or outputs data (D0 to D7) while accessing an

external area with a separate bus.

A0 to A19

VCC2

Outputs address bits A0 to A19.

A0/D0 to

A7/D7

I/O

VCC2

Inputs or outputs data (D0 to D7) and outputs address bits

(A0 to A7) by timesharing, while accessing an external area

with an 8-bit multiplexed bus.

CS0 to CS3

VCC2

Outputs chip-select signals

CS0 to CS3 to specify an

external area.

BHE

VCC2

Outputs

WR, BHE, and RD signals.

• Data is written to an external area when WR is driven low.

Data in an external area is read when

RD is driven low. An

odd address is accessed when

BHE is driven low.

ALE

VCC2

Outputs ALE signal to latch address.

HOLD

VCC2

The MCU is placed in a hold state while the

HOLD pin is

driven low.

HLDA

VCC2

In a hold state,

HLDA outputs a low-level signal.

RDY

VCC2

The MCU bus is placed in a wait state while the

RDY pin is

driven low.

R5F36CAMDFB Datasheet(PDF) 13 Page - Renesas Technology Corp

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