UPD77019-013 NEC, UPD77019-013 Datasheet - Page 38

• Manufacturer Part Number: UPD77019-013
• Description: 16 bits/ Fixed-point Digital Signal Processor
• Manufacturer: NEC

38
External Data Memory Access
Required Timing Condition
Switching Characteristics
Note t
External Data Memory Access Timing (Read)
Read data setup time
Read data hold time
WAIT setup time
WAIT hold time
Address output delay time
Address output hold time
MRD output delay time
MRD hold time
Write data output valid time
Write data output hold time
MWR output delay time
MWR setup time
MWR low level width
MWR high level width
CLKOUT
D0 - D15
DA0 -
DA13,
WAIT
MRD
X/Y
cDW
: Data wait cycle
Parameters
Parameters
t
suWA
t
dDA
t
dDR
Preliminary Data Sheet
Symbol
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
t
suDDRD
hDDRD
suWA
hWA
dDA
hDA
dDR
hDR
vDDWD
hDDWD
dDW
suDW
wDWL
wDWH
t
hWA
Conditions
Conditions
t
suWA
0.25t
+ t
0.5t
0.5t
MIN.
MIN.
t
cDW
hWA
15
12
cC
cC
0
0
0
0
0
0
cC
Note
– 3
– 5
– 5
TYP.
TYP.
t
suDDRD
t
t
hDA
hDR
t
hDDRD
MAX.
MAX.
16
8
8
PD77019-013
Unit
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns