Sharp CE-158 Service Manual page 17

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DYNAMIC ELECTRICAL CHARACTERISTICS at TA= -40
to
+85° C, Voo :it5%, tr.
If=
20 ns,
V1H = 0.7 Voo . VIL = 0.3 Voo . DL = 100 pF. See Figs. 5 and 6.
LIMITS
Yoo
CHARACTERISTIC
CDPJ854A CDP 1854AC UNITS
(V)
Min.
Typ.•
Max.
•
Min. Typ .
•
•
Max.
Receiver Timing - MODE 1
Minimum Clock Period
5
-
250 310
-
250
31 0
tee
10 125 155
ns
- -
- -
Minimum Pulse Width :
tel
5
-
100 125
-
100 125
Clock Low Level
JO
7S
JOO
ns
- - -
-
Clock High Level
5
-
100 125
-
100
12S
ten
JO 75 100
ns
-
-
-
-
TPB
t rr
5
-
100 150
-
100 150
10
so
75
ns
- - -
-
Minimum Setup l ime :
5
-
JO O
ISO
-
100 150
Data Start Bit to Clock
1
Dc
JO 50
75
ns
-
- - -
Propagation
Dela):'.
Time:
5
-
220 325
-
220 325
TPB to DA'l'A AVAl[Al![E.
1
TDA
10
110 17S
ns
- -
-
-
5 220 325 220
32S
Clock to DATA AVAI LABLE tcoA
- -
10 110
175
ns
-
- - -
Clock to Overrun Error
5
-
210 300
-
210 300
1
c o E
10 105 ISO
ns
-
- -
-
Clock to Parity Error
5
-
240 375
-
240 375
tc PE
10 120
175
ns
-
- - -
Clock to Framing Erro r
s
-
200 300
-
200 300
1
crE
10 I 00 150
ns
- - - -
CPU Interface -
READ
Timing -
MODE
l
Minimum Pulse Width :
Irr
s
-
100 ISO
-
JOO 150
TPll 10 50 75
ns
-
-
- -
Minimum Setup Time : 5
-
50 7S
-
50 75
RSEL to TPB
tRST
10 25
40
ns
- - - -
Minimum Hold T ime :
5
-
50
75
-
50
75
RSEL after TPB
t ·rns
JO
25 40
ns
-
- -
-
Read to Data Access Time
5
· -
200 300
-
200 300
1
RDDA
10 JOO
150
ns
-
- -
-
Read to Data Valid Time
5
-
200
300
-
200
300
tROV
JO JOO 150
ns
-
- - -
RSEL
to
Data
Valid Time
s
-
ISO 225
-
150 225
1
RSDV
10
75
12S
ns
- - -
-
Hold Time: 5 50 150
-
50 150
-
Data
after Read
1
RDM
10 25 75
ns
- -
- -
• Typical values are fo r TA
=
25°C and nominal voltages.
•Maximum limits of miniJnum characteristics are the values above which all devices fu nction.
15
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