at83c5132 ATMEL Corporation, at83c5132 Datasheet - Page 20

• Manufacturer Part Number: at83c5132
• Description: Usb Microcontroller With 64k Bytes Flash Memory
• Manufacturer: ATMEL Corporation

Waveforms
24
AT89C5132
Table 3. External 8-bit Bus Cycle – Data Write AC Timings
V
Figure 1. External 8-bit Bus Cycle – Data Read Waveforms
Symbol
DD
T
T
T
T
T
T
T
T
T
T
WLWH
WHLH
QVWH
WHQX
AVWL
CLCL
LLWL
LHLL
AVLL
LLAX
= 2.7 to 3.3V, T
ALE
RD
P0
P2
Parameter
Clock Period
ALE Pulse Width
Address Valid to ALE Low
Address hold after ALE
Low
ALE Low to WR Low
WR Pulse Width
WR High to ALE High
Address Valid to WR Low
Data Valid to WR High
Data Hold after WR High
A
= -40° to +85°C
T
LHLL
T
AVLL
A7:0
T
AVRL
T
T
T
LLAX
2·T
3·T
6·T
4·T
7·T
T
RLAZ
T
T
T
T
LLRL
AVDV
CLCL
CLCL
CLCL
CLCL
Min
CLCL
CLCL
CLCL
CLCL
CLCL
Standard Mode
50
Variable Clock
-20
-20
-20
-15
-15
-30
-25
-30
-20
T
RLDV
T
CLCL
Max
A15:8
T
RLRH
+20
0.5·T
0.5·T
1.5·T
0.5·T
3.5·T
0.5·T
Data In
3·T
2·T
T
D7:0
CLCL
Min
CLCL
CLCL
50
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
Variable Clock
T
-15
-25
-30
RHDX
-20
-20
-30
-20
-20
-15
T
X2 Mode
RHDZ
T
RHLH
0.5·T
Max
CLCL
4173CS–USB–07/04
+20
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns