參數(shù)資料
型號: ST6253BB6
廠商: 意法半導體
英文描述: 8-BIT OTP/EPROM MCUs WITH A/D CONVERTER, AUTO-RELOAD TIMER, EEPROM AND SPI
中文描述: 8位檢察官辦公室/存儲器與阿微控制器/ D轉換器,自動重加載定時器,EEPROM和的SPI
文件頁數(shù): 46/75頁
文件大小: 540K
代理商: ST6253BB6
46/75
ST62T53B/T60B/T63B ST62E60B
AUTO-RELOAD TIMER
(Cont’d)
AR Status Control Register 1(ARSC1)
Address: D7h
— Read/Write
Bist 7-5 =
PS2-PS0
: Prescaler Division Selection
Bits 2-0. These bits determine the Prescaler divi-
sion ratio. The prescaler itself is not affected by
thesebits.Theprescaler division ratioislisted inthe
following table:
Table 15.. Prescaler Division Ratio Selection
Bit 4 =
D4
: Reserved Must be kept reset.
Bit3-2 =
SL1-SL0
:Timer Input Edge ControlBits 1-
0.These bits control the edge function of the Timer
input pinforexternal synchronization. IfbitSL0isre-
set, edgedetection isdisabled; ifsetedge detection
is enabled. Ifbit SL1isreset,the AR Timer input pin
is rising edge sensitive; if set, it is falling edge sen-
sitive.
Bit 1-0 =
CC1-CC0
: Clock Source Select Bit 1-0.
These bits select theclock source forthe AR Timer
through the AR Multiplexer. The programming of
theclocksources isexplained inthe followingTable
16:
Table 16.. Clock Source Selection.
AR Load Register ARLR
. The ARLR load register
is used to read or write the ARTC counter register
“on the fly” (while it is counting). The ARLR regis-
ter is not affected by system reset.
AR Load Register (ARLR)
Address: DBh
— Read/Write
Bit 7-0 =
D7-D0
: Load Register Data Bits.These
are the load register data bits.
AR Reload/Capture Register
. The ARRC reload/
capture register is used to hold the auto-reload
value which is automatically loaded into the coun-
ter when overflow occurs.
AR Reload/Capture (ARRC)
Address: D9h
Read/Write
Bit 7-0 =
D7-D0
: Reload/Capture Data Bits These
are the Reload/Capture register data bits.
AR Compare Register
. The CP compare register
is used to hold the compare value for the compare
function.
AR Compare Register (ARCP)
Address: DAh
— Read/Write
Bit 7-0 =
D7-D0
: Compare Data Bits These are
the Compare register data bits.
7
0
PS2
PS1
PS0
D4
SL1
SL0
CC1
CC0
PS2
0
0
0
0
1
1
1
1
PS1
0
0
1
1
0
0
1
1
PS0
0
1
0
1
0
1
0
1
ARPSC Division Ratio
1
2
4
8
16
32
64
128
SL1
X
0
1
SL0
0
1
1
Edge Detection
Disabled
Rising Edge
Falling Edge
CC1
0
0
1
1
CC0
0
1
0
1
Clock Source
F
int
F
int
Divided by 3
ARTIMin Input Clock
Reserved
7
0
D7
D6
D5
D4
D3
D2
D1
D0
7
0
D7
D6
D5
D4
D3
D2
D1
D0
7
0
D7
D6
D5
D4
D3
D2
D1
D0
46
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