Intel 8253 - Timing Waveforms

19
Timing Waveforms
FIGURE 25. MODE 0 (BASIC INPUT)
FIGURE 26. MODE 0 (BASIC OUTPUT)
FIGURE 27. MODE 1 (STROBED INPUT)
tRA (2)
tHR (14)
tRR (3)
tIR (13)
tAR (1)
tRD (4) tDF (5)
RD
INPUT
CS, A1, A0
D7-D0
tAW (7)
tWA (8)
tWS (12)
tWW (9)
tWD (11)
tDW
WR
D7-D0
CS, A1, A0
OUTPUT
(10)
tST (16)
STB
INTR
RD
INPUT FROM
IBF
PERIPHERAL
tSIB
tSIT
tPH
tPS (17)
tRIT
tRIB (24)
(23)
(26)
(25)
(18)
82C55A