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參數(shù)資料
型號: W79E532A40FL
廠商: WINBOND ELECTRONICS CORP
元件分類: 微控制器/微處理器
英文描述: 8-BIT MICROCONTROLLER
中文描述: 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PQFP44
封裝: ROHS COMPLIANT, QFP-44
文件頁數(shù): 13/77頁
文件大小: 523K
代理商: W79E532A40FL
W79E532/W79L532
Publication Release Date: November 21, 2005
- 13 -
Revision A5
Clock Control
Bit:
7
6
5
4
3
2
1
0
WD1
WD0
T2M
T1M
T0M
MD2
MD1
MD0
Mnemonic: CKCON
Address: 8Eh
WD1
0: Watchdog timer mode select bits: These bits determine the time-out period for the watchdog
timer. In all four time-out options the reset time-out is 512 clocks more than the interrupt time-
out period.
WD1
WD0
Interrupt time-out
0
0
2
20
1
0
2
26
Reset time-out
2
17
+ 512
2
20
+ 512
2
23
+ 512
2
26
+ 512
2
17
0
1
2
23
1
1
T2M:
Timer 2 clock select: When T2M is set to 1, timer 2 uses a divide by 4 clock, and when set to
0 it uses a divide by 12 clock.
T1M:
Timer 1 clock select: When T1M is set to 1, timer 1 uses a divide by 4 clock, and when set to
0 it uses a divide by 12 clock.
T0M:
Timer 0 clock select: When T0M is set to 1, timer 0 uses a divide by 4 clock, and when set to
0 it uses a divide by 12 clock.
MD2
0: Stretch MOVX select bits: These three bits are used to select the stretch value for the MOVX
instruction. Using a variable MOVX length enables the user to access slower external
memory devices or peripherals without the need for external circuits. The
RD
or
WR
strobe
will be stretched by the selected interval. When accessing the on-chip SRAM, the MOVX
instruction is always in 2 machine cycles regardless of the stretch setting. By default, the
stretch has value of 1. If the user needs faster accessing, then a stretch value of 0 should be
selected.
MD2
MD1
MD0
Stretch value MOVX duration
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
2
3
4
5
6
7
2 machine cycles
3 machine cycles
(Default)
4 machine cycles
5 machine cycles
6 machine cycles
7 machine cycles
8 machine cycles
9 machine cycles
相關(guān)PDF資料
PDF描述
W79E532A40FN 8-BIT MICROCONTROLLER
W79E532A40PL 8-BIT MICROCONTROLLER
W79E532A40PN 8-BIT MICROCONTROLLER
W79L532 8-BIT MICROCONTROLLER
W79L532A25DL 8-BIT MICROCONTROLLER
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