HD6432138SW datasheet(163/1061 Pages) RENESAS

163 / 1061 page

Section 5 Interrupt Controller

Rev. 4.00 Jun 06, 2006 page 109 of 1004

REJ09B0301-0400

5.2.6

Keyboard Matrix Interrupt Mask Register (KMIMR)

KMIMR7

R/W

KMIMR6

R/W

KMIMR5

R/W

KMIMR4

R/W

KMIMR3

R/W

KMIMR0

R/W

KMIMR2

R/W

KMIMR1

R/W

Bit

Initial value

Read/Write

KMIMR is an 8-bit readable/writable register that performs mask control for the keyboard matrix

interrupt inputs (pins

KIN7 to KIN0) and IRQ6 pin. To enable key-sense input interrupts from

multiple pin inputs in keyboard matrix scanning/sensing, clear the corresponding mask bits to 0.

KMIMR is initialized to H'BF by a reset and in hardware standby mode, and only

IRQ6 (KIN6)

input is enabled.

Bits 7 to 0—Keyboard Matrix Interrupt Mask (KMIMR7 to KMIMR0): These bits control

key-sense input interrupt requests (KIN7 to KIN0).

Bits 7 to 0

KMIMR7 to

KMIMR0

Description

Key-sense input interrupt requests enabled

Key-sense input interrupt requests disabled

(Initial value)*

Note:

However, the initial value of KMIMR6 is 0 because the KMIMR6 bit controls both

IRQ6

interrupt request masking and key-sense input enabling.

Figure 5.2 shows the relationship between interrupts IRQ6, interrupts KIN7 to KIN0, and registers

KMIMR.

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