HT9580 データシートの表示（PDF） - Holtek Semiconductor

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HT9580

Character Pager Controller

Holtek Semiconductor 

Preliminary

HT9580

I/O port configuration registers

Address

000BH

000CH

000DH

000EH

000FH

0010H

0011H

0012H

0013H

0014H

Register

Name

PA data

PB data

PC data

PAC

PBC

PCC

PA WUE

PA IM

PB IM

PC IM

Bit 7

X

PB7

X

X

PBC7

X

X

X

PBIM7

X

Bit 6

X

PB6

X

X

PBC6

X

X

X

PBIM6

X

Bit 5

PA5

PB5

X

PAC5

PBC5

X

PAWUE5

PAIM5

PBIM5

X

Bit 4

PA4

PB4

X

PAC4

PBC4

X

PAWUE4

PAIM4

PBIM4

X

Bit 3

PA3

PB3

X

PAC3

PBC3

X

PAWUE3

PAIM3

PBIM3

X

Bit 2

PA2

PB2

X

PAC2

PBC2

X

PAWUE2

PAIM2

PBIM2

X

Bit 1

PA1

PB1

PC1

PAC1

PBC1

PCC1

PAWUE1

PAIM1

PBIM1

PCIM1

Bit 0

State on

POR

PA0

uu11 1111

PB0

1111 1111

PC0

uuuu uu11

PAC0

uu11 1111

PBC0

1111 1111

PCC0 uuuu uu11

PAWUE0 uu00 0000

PAIM0 uu11 1111

PBIM0 1111 1111

PCIM0 uuuu uu11

The HT9580 has three general purpose I/O

ports. The I/O cell structures are configurable.

Details are shown in the table.

Port A

Port A is a general-purpose I/O port. The PAC

register controls the data directions for port A.

When set as input data type, this port has

wake-up capability and the input cell struc-

tures are schmitt trigger types. While in a

²HALT² condition, a falling edge signal on Port

A can wake-up the mC. In addition, the input

cell structures can be configured as pull-high or

non-pull-high. When set as an output data type,

the output structures are CMOS outputs.

1

0

PA

The pin output

logic high

The pin output

logic low

PAC

As input pin

As output pin

The pin has

PAWUE wake-up

capability

The pin has no

wake-up

capability

PAIM

CMOS input

structure

with pull-high

resistor

CMOS input

structure with-

out pull-high

resistor

Port B

Port B is a general-purpose I/O port controlled

by the PBC register. The PBIM register con-

trols the input cell structures: normal CMOS

inputs or CMOS inputs with pull-high resis-

tors.

1

0

PB

Pin output

logic high

Pin output

logic low

PBC

Input pin

Output pin

PBIM

CMOS input

structure with

pull-high

resistor

CMOS input

structure without

pull-high resistor

Port C

This is a general-purpose I/O port contolled by

the PCC register. The PCIM register controls

the input cell structures: normal CMOS inputs

or CMOS inputs with pull-high resistors.

1

0

PC

The pin output The pin output

logic high

logic low

PCC

As input pin As output pin

PCIM

CMOS input

structure

with pull-high

resistor

CMOS input

structure

without pull-high

resistor

19

April 28, 2000

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