HD404354 データシートの表示（PDF） - Hitachi -> Renesas Electronics

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HD404354

4-bit HMCS400-series microcomputer

Hitachi -> Renesas Electronics 

HD404358 Series

Port mode register A (PMRA: $004)

Bit

Initial value

Read/Write

Bit name

3

0

W

PMRA3

2

1

0

0

W

W

PMRA2 PMRA1

0

0

W

PMRA0

PMRA2

0

1

R03/TOC Mode Selection

R03

TOC

PMRA3

0

1

D3/BUZZ Mode Selection

D3

BUZZ

PMRA0

0

1

R02/SO Mode Selection

R02

SO

PMRA1

0

1

R01/SI Mode Selection

R01

SI

Figure 60 Port Mode Register A (PMRA)

Miscellaneous Register (MIS: $00C): This register has the following functions (figure 61).

• R02/SO pin PMOS control

Miscellaneous register (MIS: $00C) is a 4-bit write-only register and is reset to $0 by MCU reset.

Miscellaneous register (MIS: $00C)

Bit

Initial value

Read/Write

Bit name

3

0

W

MIS3

2

0

W

MIS2

1

0

—

—

—

—

Not used Not used

MIS3

0

1

Pull-Up MOS

On/Off Selection

Pull-up MOS off

Pull-up MOS on

(refer to table 21)

MIS2

0

1

CMOS Buffer

On/Off Selection

for Pin R02/SO

PMOS active

PMOS off

Figure 61 Miscellaneous Register (MIS)

71

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