UPD62A View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD62A

4-BIT SINGLE-CHIP MICROCONTROLLER FOR INFRARED REMOTE CONTROL TRANSMISSION

NEC => Renesas Technology 

µPD62A

3. PORT REGISTERS (PX)

The KI/O port, the KI port, the special ports (S0, S1/LED), and the control registers are treated as port registers.

The port register values after reset are shown below.

Figure 3-1. Port Register Configuration

KI/O7

KI3

0

0

Port Register

After Reset

P0

FFH

P10

P00

KI/O6

KI/O5

KI/O4

KI/O3

P1

KI/O2

KI/O1

KI/O0

× FHNote

P11

P01

KI2

KI1

KI0

S1/LED

S0

1

1

P3 (Control register 0)

03H

P13

P03

0

DP9

DP8

TCTL

CARY

MOD1

MOD0

P4 (Control register 1)

26H

P14

0

KI

S0/S1

pull-down pull-down

P04

0

S1/LED mode KI/O mode S0 mode

Note ×: Refers to the value based on the KI pin status.

Table 3-1. Relationship Between Ports and Read/Write

Port Name

KI/O

KI

S0

S1/LED

Input Mode

Read

Write

Pin status

Output latch

Pin status

—

Pin status

—

Pin status

—

Output Mode

Read

Write

Output latch Output latch

—

—

Note

—

Pin status

—

Note When in OFF mode, “1” is normally read.

14

Data Sheet U14474EJ1V0DS00

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