Real Time Devices AD1200 User Manual page 128

intef
82C55A
CAPACITANCE
Tq : 25"G, Vgg :Q|lP - 9Y
Symbol
Parameter
Mln
l/lax Unlts
Test Condltlons
GrH lnput Capacitance
1 0
pF
Unmeasured plns
returned to GND
lc : 1 MHz(s)
cvo
!/O Capacitance 20
pF
NOTE:
5. Sampled not 10006 test€d.
A.C. CHARACTERISTICS
TA : 0o to 70'C, Vcc : +5V t10o/o, GND : 0V
TA : -40'C to +85'C for Extended Temperature
BUS PARAMETERS
READ CYCLE
Symbol Parameter
82C554.2
Unlts
Tert
Condltlons
llln
tar
tnn
Address Stable Before F-D J 0
ns
tRa
Address Hold Time Atter F'D 1 0
ns
tnn RD Putse Widtn
150
ns
tRo
Data DelayfromFEJ 120
ns
tor
HDt to Datra Floating
1 0 75
ns
tnv
Recovery Time batween HE/WH
200
ns
WRITE CYCLE
Symbol Parametcr
82C55A-2
Unlte
Tcet
Gondltlonr
tln tar
tew Address Stable Before WFI J,
0 ns
twe
Address Hold Time After WF 1
20
ns
Ports A & B
20
ns
PortC
tww
WF Pulse width
100
ns
tow
Data Setup Time Before WFi f 100 ns
two
Data Hold Time After WF f
30
ns
Ports A & B
30 ns
Port C
3-142