參數(shù)資料
型號(hào): HMS81C20XXA-HK
廠商: Electronic Theatre Controls, Inc.
英文描述: CMOS Single-Chip 8-Bit Microcontroller with A/D Converter & VFD Driver
中文描述: CMOS單芯片8位微控制器與A / D轉(zhuǎn)換器
文件頁數(shù): 80/107頁
文件大?。?/td> 1482K
代理商: HMS81C20XXA-HK
HMS81C2012A/2020A
76
SEP. 2004 Ver 2.00
17.1 Operating Mode
ACTIVE Mode
SCMR.1 = 0
f
XI
: oscillation
f
SXI
: oscillation
cpu : f
SYS
tmr : f
SYS
peri : f
SYS
SCMR.0 = 0
+
SCMR.1 = 0
SCMR.1 = 1
SUB-ACTIVE Mode
SCMR.1 = 1
SCMR.0 = 0/1
f
XI
: stop
f
SXI
: oscillation
cpu : f
SUB
tmr : f
SUB
peri : f
SUB
STANDBY Mode
SCMR.1 = 0
f
XI
: oscillation
f
SXI
: oscillation
cpu : stop
tmr : ps11(f
XI
)
peri : stop
CKCTLR[10]
+
STOP
TIMER0
EXT_INT
RESET
RC_WDT
WATCH Mode
SCMR.1 = 1
f
XI
: stop
f
SXI
: oscillation
cpu : stop
tmr : ps11(f
SXI
)
peri : stop
CKCTLR[10]
+
STOP
TIMER0
EXT_INT
RESET
RC_WDT
STOP Mode
SCMR.2 = 1
(SUB_CLK OFF)
f
XI
: stop
f
SXI
: stop
cpu : stop
tmr : stop
peri : stop
EXT_INT
RESET
RC_WDT
CKCTLR[00]
+
STOP
EXT_INT
RESET
RC_WDT
CKCTLR[00]
+
STOP
System Clock Mode Register
SCMR
ADDRESS : FAH
RESET VALUE : ---00000
-
-
-
CS1
CS0
SUBOFF
CLKSEL MAINOFF
CS[1:0]
Clock selection enable bits
00 : f
XI
10 : f
XI
÷
8
01 : f
XI
÷
4 11 : f
XI
÷
32
CLKSEL
Clock selection bit
0 : Main clock selection
1 : Sub clock selection
SUBOFF
Sub clock control bit
0: On sub clock
1: Off sub clock
MAINOFF
Main clock control bit
0: On main clock
1: Off main clock
f
SXI
: sub clock frequency
f
SYS
: f
XI
,f
XI
÷4
,f
XI
÷
8,f
XI
÷
32
f
SUB
: f
SXI
,f
SXI
÷4
,f
SXI
÷
8,f
SXI
÷
32
cpu : system clock
tmr : timer0 clock
peri : peripheral clock
CKCTLR = CKCTLR[6:5]
f
XI
: Main clock frequency
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