Tandy 1000 SL Technical Reference Manual page 182

NEC
AC Characteristics
TA = -10% to +70°C. VCC
=
+5 V f5%
(crPD765Al7265A) and V c c
=
+5V
flO% (lrPD765A-2n265A-2)
ulnlb
70SA, 7905 700A-2,7205-2 T n l
Plnmrkr Symbol Yin Typ(i) Max Yin
Typ(iJ
Y u
Unit Condltkna
Clock Deriod
@CY
120 125 500 120 125 500
ns
(Note4)
125 125 ns 8"FDD
250
250 ns
5114' ' FDD
125 125 ns 3W'Sony (3)
Clock active (high, low)
@O
40 40
ns
Clock rise time
@.
20 20 ns
Clock fall time 4 1
20
20 ns
no.=,
DACKsetuptimetomI ~ A R
0
0
nS
no, E,
6 i i %
hold time from t t~ 0 0
ns
RO width
~ R R
250 200 ns
Data access time from
mI
~ R D
200 140
ns
C~=100pF
OB to float delay time from t IDF
20 100 10 85 ns C~=100pF
no,
E,
DACKsetup time
t o m b
tAW
0
0 ns
Ao,
E,
&$%hold time t o m t IWA
0
0
ns
WR width h v
250 200 ns
-
-
Data setup time t o m t
tDW
150 100 ns
5 0 ns
INT delay time from
mt
tRl tWD
500 400 ns
Data hold time f r o m m t
INT delay time from t
tWl
500 400 ns
DRO cycle time
tMCY 13 13
ps
@~y=125ns(4)
DACKI- DROIdelay
AM
200 140
ns
DRO t
-
DACKI
delay
MA
200 200
ns
@cy=125ns (4)
-
DACK width
tAA
2 2
@CY
TC width
tTC
1 1
@CY
WCK cycle time
I C Y
4 16 @cy MFM=O. 5'14"
2 8 @cy MFM=l. 5114"
-
Reset width
t R S l
14 14
@CY
2 8
@ r v
MFM=0.8
1 4 @cy MFM=l. 31/2"(3)
WCK active time (high)
1 0
2 2
@CY
CLKt- WCKtdelav trwu 0 40 0 40 ns
CLKt- WCKIdelay tCWL 0 40 0 40 ns
WCK rise time
1,
20 20 ns
WCK fall time tf 20 20 ns
Preshiil delay time from WCKt tcp 20 100 20 100 ns
WCKt
-
WEt delav
tCWF
20 100 20 100 ns
WDA delay time from WCK t
ICD
20 100 20 100 ns
ROO active time (high)
ADO
40 40 ns
6-7