SH7144 Datasheet, PDF(557/773 Page) Renesas Technology Corp – Hitachi SuperH RISC engine

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SH7144 Datasheet, PDF (557/773 Pages) Renesas Technology Corp – Hitachi SuperH RISC engine

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17.1.2 Port A Control Registers L2, L1, and H (PACRL2, PACRL1, and PACRH)

The port A control registers L2, L1, and H (PACRL2, PACRL1 and PACRH) are 16-bit

readable/writable registers that are used to select the functions of the multiplexed pins on port A.

(1) Port A Control Registers L2, L1, and H (PACRL2, PACRL1, and PACRH) in the

SH7144

Register Bit

Initial

Bit Name Value R/W

PACRH 15, 13 ï£§

All 0 R

PACRH 11, 9 ï£§

All 0 R

PACRH 14, 12 ï£§

All 0 R/W

PACRH 10, 8 ï£§

All 0 R/W

PACRH 7 to 0 ï£§

All 0 R/W

PACRL1 15 PA15MD1 0

R/W

PACRL1 14 PA15MD0 0*1

R/W

PACRL1 13 PA14MD1 0

R/W

PACRL1 12 PA14MD0 0*2

R/W

PACRL1 11 PA13MD1 0

R/W

PACRL1 10 PA13MD0 0*2

R/W

Description

Reserved

These bits are always read as 0s and should

always be written with 0s.

PA15 Mode

Select the function of the PA15/CK pin.

00: PA15 I/O (port)

01: CK output (CPG)

10: Setting prohibited

11: Setting prohibited

PA14 Mode

Select the function of the PA14/RD pin.

00: PA14 I/O (port)

01: RD output (BSC)

10: Setting prohibited

11: Setting prohibited

PA13 Mode

Select the function of the PA13/WRH pin.

00: PA13 I/O (port)

01: WRH output (BSC)

10: Setting prohibited

11: Setting prohibited

Rev. 2.0, 09/02, page 517 of 732

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