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intef
82C55A
OTHER TITII{GS
1. INTR f may occur as earty as WF J .
2' Pulse width of initiat Reset pulse after power on must be at least 50 pSec. Subseguent Reset pulses may be 5111)
ng
minimum.
Symbol
Parameter
82C55A-2
Unlts
Gondltlons
Test
Mln
ilar
tws
W'F i :l t o Ou t p u t
350
ns
tn
Peripheral Data Before H-D
0
ns
tnn
Peripheral Data Atter RD-
0
ns
tnx
7ffi Pube widrh
200
ns
tsr
SfB Pulse Width
1 0 0
ns
tps
Per. Data Before Sffi Xigfr
20
ns
tpx
Per. DataAtterSTBHign
50
ns
teo
Iffi:
OtoOutput
't75
ns
txo
Fffi : 1 to Output Float
20
250
ns
twog
W F i : l t o OE F : O
150
ns
tnog
A f f i : 0 t o O B F : 1
1 5 0
ns
lsre
S f B : 0 t o l B F - 1
1 5 0
ns
tnra
R - D : ' l t o l B F : 0
150
ns
tnr
HD : Oto INTR : 0
200
ns
tgr
S T E : l t o | N T R : 1
1 5 0
ns
tnn
F f f i : l t o | N T R : 1
150
ns
twr
WFi : Oto INTR : 0
200
ns
se€ note 1
tnes
Reset Pulse Width
500
ns
s€e not€ 2
}IOTE:
3-143
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