GM82C765B
2.3 AC Timing Specifications
TA
=
0
°
C (32
°
F)
SYMBOL
t
CY
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
to
70
°
C (158
°
F)
:
VCC
= +
5V
±
10%
:
CL
=
100 pF
PARAMETER
MIN
60
25
5
5
RD
RD
MAX
UNITS
nS
nS
nS
nS
nS
nS
nS
Clock Period
Clock Active (High or Low)
Clock Rise Time (Vin 0.8 to 2.0)
Clock Fall Time (Vin 2.0 to 0.8)
A0,
A0,
RD
CS
,
DACK
CS
,
DACK
PH
R
F
AR
RA
RR
RD
DF
AW
WA
WW
DW
WD
RI
WI
MCY
AM
MA
AA
TC
RST
SRST
RDD
Set Up Time to
Hold Time from
RD
RD
Low
High
0
0
90
90
10
WR
WR
Width
Low
High
Low
High
Data Access Time from
DB To Float Delay from
A0,
A0,
WR
CS
,
DACK
CS
,
DACK
nS
nS
nS
nS
nS
nS
nS
65
,
LDCR
,
LDOR
, Set Up Time to
,
LDCR
,
LDOR
, Hold Time from
High
High
RD
WR
0
0
60
80
0
Width
WR
WR
Data Set Up Time to
Data Hold Time from
IRQ Reset Delay Time from
IRQ Reset Delay Time from
DMA Cycle Time
DMA Reset Delay Time from
DACK
DACK
High
High
Low
0
0
52
1MCY + 150nS
1MCY + 150nS
MCY
140
nS
nS
nS
nS
nS
MCY
nS
MCY
MCY
MCY
MCY
MCY
DACK
Delay Time from DMA High
Width
0
90
60
250
5
40
1/2 (TYP)
TC Width
Reset Width-TTL Driven CLK1
Reset Width-Software Reset
RDD
WD
DIRC
DSX
STEP
STEP
Active Time Low
Write Data Width Low
Hold & Set Up to
Hold Time from
Active Time Low
Cycle Time
STEP
t
WDD
t
t
DST
STU
STP
SC
Low
4
20
24
132
STEP
Low
t
t
(continued on next page)
7
HYNIX [ HYNIX SEMICONDUCTOR ]
