HD404328UH View Datasheet(PDF) - Renesas Electronics

Part Name

Description

Manufacturer

HD404328UH

4-bit HMCS400-series microcomputer

Renesas Electronics 

HD404328 Series

Input/Output

The MCU has 2 input pins and 33 input/output pins, 8 of the input/output pins being large-current pins (15

mA, max.). A program-controlled pull-up MOS transistor is provided for each input/output pin.

The output buffer is turned on and off by the data control register (DCR) during input through an

input/output pin.

I/O pin circuit types are shown in table 22.

Table 22 Circuit Configurations of I/O Pins

I/O Pin Type

Common I/O

Pin (with

pull-up MOS

transistor)

Circuit

VCC

VCC

Input control

VCC

VCC

Output Pin

(with pull-up

MOS transistor)

Input Pin

VCC

VCC

VCC

Pull-up control signal

DCR

Output data

PDR

Input data

Pull-up control signal

DCR

Output data SCK (internal)

SCK

Pull-up control signal

DCR

Output data SO or BUZZ

Pull-up control signal

PDR

Applicable Pins

D0–D8

R0 0–R0 3

R 10–R 13

R2 0–R2 3

R3 0–R3 3

R4 0–R4 3

R5 0–R5 3

SCK

SO

BUZZ

INT0

INT1

SI

EVENT

Input control

Input data

AC input signal

External capacitor

Zero-crossing

detection circuit

Note: For details of the R12 /SO pin, refer to note 2 of table 23.

D9

D 10

ZCD

40

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