HD6432138SW datasheet(470/1061 Pages) RENESAS

470 / 1061 page

Section 15 Serial Communication Interface (SCI, IrDA)

Rev. 4.00 Jun 06, 2006 page 416 of 1004

REJ09B0301-0400

15.2.11

Keyboard Comparator Control Register (KBCOMP)

IrE

R/W

IrCKS2

R/W

IrCKS1

R/W

IrCKS0

R/W

KBADE

R/W

KBCH0

R/W

KBCH2

R/W

KBCH1

R/W

Bit

Initial value

Read/Write

KBCOMP is an 8-bit readable/writable register that selects the functions of SCI2 and the A/D

converter.

KBCOMP is initialized to H'00 by a reset and in hardware standby mode.

Bit 7—IrDA Enable (IrE): Specifies normal SCI operation or IrDA operation for SCI2

input/output.

Bit 7

IrE

Description

The TxD2/IrTxD and RxD2/IrRxD pins function as TxD2 and RxD2

(Initial value)

The TxD2/IrTxD and RxD2/IrRxD pins function as IrTxD and IrRxD

Bits 6 to 4—IrDA Clock Select 2 to 0 (IrCKS2 to IrCKS0): These bits specify the high pulse

width in IrTxD output pulse encoding when the IrDA function is enabled.

Bit 6

Bit 5

Bit 4

IrCKS2

IrCKS1

IrCKS0

Description

× 3/16 (3/16 of the bit rate)

(Initial value)

φ/2

φ/4

φ/8

φ/16

φ/32

φ/64

φ/128

Bits 3 to 0—Keyboard Comparator Control: See the description in section 19, A/D converter.

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