HD6432138SW datasheet(613/1061 Pages) RENESAS

613 / 1061 page

Section 19 A/D Converter

Rev. 4.00 Jun 06, 2006 page 559 of 1004

REJ09B0301-0400

Bits 7 and 6—Timer Trigger Select 1 and 0 (TRGS1, TRGS0): These bits select enabling or

disabling of the start of A/D conversion by a trigger signal. Only set bits TRGS1 and TRGS0

while conversion is stopped.

Bit 7

Bit 6

TRGS1

TRGS0

Description

Start of A/D conversion by external trigger is disabled

(Initial value)

Start of A/D conversion by external trigger is disabled

Start of A/D conversion by external trigger (8-bit timer) is enabled

Start of A/D conversion by external trigger pin is enabled

Bits 5 to 0—Reserved: Should always be written 1.

Note:

Some of these bits are readable/writable in products other than the HD64F2138,

HD64F2134, HD64F2132R, HD6432132, and HD6432130, however, when writing, be

sure to write 1 here for software compatibility.

19.2.4

Keyboard Comparator Control Register (KBCOMP)

Bit

76543210

IrE

IrCKS2

IrCKS1

IrCKS0

KBADE

KBCH2

KBCH1

KBCH0

Initial value

00000000

Read/Write

R/W

KBCOMP is an 8-bit readable/writable register that controls the SCI2 IrDA function and selects

the CIN input channels for A/D conversion.

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

Bits 7 to 4—IrDA Control: See the description in section 15.2.11, Keyboard Comparator Control

Bit 3—Keyboard A/D Enable: Selects either analog input pin (AN6) or digital input pin (CIN0

to CIN7) for A/D converter channel 6 input. If digital input pins are selected, input on A/D

converter channel 7 will not be converted correctly.

Bits 2 to 0—Keyboard A/D Channel Select 2 to 0 (KBCH2 to KBCH0): These bits select the

channels for A/D conversion from among the digital input pins. Only set the input channel while

A/D conversion is stopped.

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