Renesas H8S/2158, User Manual

Page: 757 / 929

Section 22 A/D Converter
Rev. 3.00 Jan 25, 2006 page 703 of 872
REJ09B0286-0300
22.3.4 Keyboard Comparator Control Register (KBCOMP)
KBCOMP selects the CIN input channel for which A/D conversion is performed and enables or
disables the comparator scan function of CIN7 to CIN0.
The DTC decides where to store the A/D conversion result according to settings of the KBCH2 to
KBCH0 bits.
Bit Bit Name Initial Value R/W Description
7 — 0 R/(W) Reserved
The initial value should not be changed.
6, 5 — All 0 R Reserved
These bits are always read as 0 and cannot be
modified.
4 SCANE 0 R/W DTC Comparator Scan Enable
Enables or disables the DTC comparator scan function.
0: Disables DTC comparator scan function
1: Enables DTC comparator scan function
3 KBADE 0 R/W Keyboard A/D Enable
Sets analog pin 0 (AN0) of the A/D converter to digital
input pins (CIN7 to CIN0).
0: Selects AN0 (not mounted on this LSI)
1: Selects CIN7 to CIN0
2
1
0 KBCH2
KBCH1
KBCH0 0
0
0 R/W
R/W
R/W Keyboard A/D Channel Select 2 to 0
These bits select a channel of digital input pins (CIN7 to
CIN0) for A/D conversion. The input channel setting
must be made while conversion is halted. When the
SCANE bit is set to 1, these bits are automatically
incremented by the DTC.
000: Selects CIN0
001: Selects CIN1
010: Selects CIN2
011: Selects CIN3
100: Selects CIN4
101: Selects CIN5
110: Selects CIN6
111: Selects CIN7