參數(shù)資料
型號(hào): P8254
廠商: Intersil Corporation
英文描述: CMOS Programmable Interval Timer
中文描述: CMOS可編程間隔定時(shí)器
文件頁(yè)數(shù): 15/17頁(yè)
文件大?。?/td> 142K
代理商: P8254
4-15
Timing Waveforms
FIGURE 17. WRITE
FIGURE 18. READ
FIGURE 19. RECOVERY
FIGURE 20. CLOCK AND GATE
A0 - A1
CS
DATA BUS
WR
(12)
tWW
(13)
tDW
(10)
tSW
(9)
tAW
VALID
tWD
(14)
tWA (11)
VALID
A0 - A1
CS
RD
DATA BUS
(2)
tSR
(6)
tAD
(5)
tRD
(4)
tRR
(7)
tDF
tRA (3)
tAR (1)
(8) (15)
tRV
RD, WR
WR
CLK
GATE
OUT
MODE
COUNT
(SEE NOTE)
(17)
tPWH
(18)
tPWL
(16)
tCLK
tGS
(21)
tGW
(27)
tWO
tGS
(23)
tGH
(24)
tGL
tODG (26)
tF (20)
tOD (25)
tGH (24)
NOTE: LAST BYTE OF COUNT BEING WRITTEN
(19)
tR
(22)
(23)
tCL (30)
tWC (28)
82C54
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