參數(shù)資料
型號(hào): HD4074459
廠商: Hitachi,Ltd.
英文描述: 4-bit HMCS400-Series microcomputer(4位單片微計(jì)算機(jī))
中文描述: 4位HMCS400系列微機(jī)(4位單片微計(jì)算機(jī))
文件頁數(shù): 97/120頁
文件大?。?/td> 692K
代理商: HD4074459
HD404459 Series
97
Comparator Control Register (CCR: $016):
Four-bit write-only register which selects a 16-level internal
reference power supply (figure 80). The comparator control register (CCR: $016) is reset to $0 by MCU
reset.
Bit
Initial value
Read/Write
Bit name
3
0
W
CCR3
2
0
W
CCR2
0
0
W
CCR0
1
0
W
CCR1
Comparator control register (CCR: $016)
CCR0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
Reference power supply selection
1/17 V
CC
2/17 V
CC
3/17 V
CC
4/17 V
CC
5/17 V
CC
6/17 V
CC
7/17 V
CC
8/17 V
CC
9/17 V
CC
10/17 V
CC
11/17 V
CC
12/17 V
CC
13/17 V
CC
14/17 V
CC
15/17 V
CC
16/17 V
CC
CCR1
0
1
0
1
0
1
0
1
CCR2
0
1
0
1
CCR3
0
1
Figure 80 Comparator Control Register (CCR)
Comparator Enable Register (CER: $017):
This register consists of a 3-bit write-only register and a 1-bit
read-only register. It selects the analog input pins and reference voltage, and indicates the voltage
comparison result. The comparison result output is 0 when an analog input voltage is lower than the
reference voltage, and is 1 when an analog input voltage is higher than the reference voltage. The
comparison result is read by the bit test instruction (TM or TMD). The comparator enable register (CER:
$017) is reset to $0 by MCU reset.
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