HD64F2145 datasheet(130/829 Pages) RENESAS

130 / 829 page

Rev. 2.0, 08/02, page 90 of 788

• BARB

Bit

Bit Name

Initial Value

R/W

Description

A15

All 0

R/W

Addresses 15 to 8

The A15 to A8 bits are compared with A15 to

A8 in the internal address bus.

• BARC

Bit

Bit Name

Initial Value

R/W

Description

All 0

R/W

Addresses 7 to 1

The A7 to A1 bits are compared with A7 to A1 in

the internal address bus.

0—

Reserved

This bit is always read as 0 and cannot be

modified.

5.3.4

IRQ Sense Control Registers (ISCRH, ISCRL)

The ISCR registers select the source that generates an interrupt request at pins

,54: to ,543.

• ISCRH

Bit

Bit Name

Initial Value

R/W

Description

IRQ7SCB

IRQ7SCA

R/W

IRQ6SCB

IRQ6SCA

R/W

IRQ5SCB

IRQ5SCA

R/W

IRQ4SCB

IRQ4SCA

R/W

IRQn Sense Control B

IRQn Sense Control A

00: Interrupt request generated at low level of

,54Q input

01: Interrupt request generated at falling edge

,54Q input

10: Interrupt request generated at rising edge of

,54Q input

11: Interrupt request generated at both falling

and rising edges of

,54Q input

(n = 7 to 4)

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