AT89C5132 Atmel Corporation, AT89C5132 Datasheet - Page 20

• Manufacturer Part Number: AT89C5132
• Manufacturer: Atmel Corporation

Specifications of AT89C5132

• Flash (kbytes): 64 Kbytes
• Max. Operating Frequency: 20 MHz
• Cpu: 8051-12C
• Max I/o Pins: 44
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 1
• Uart: 1
• Adc Channels: 2
• Adc Resolution (bits): 10
• Adc Speed (ksps): 22.7
• Sram (kbytes): 2.25
• Self Program Memory: API
• Operating Voltage (vcc): 2.7 to 3.6
• Timers: 2
• Isp: UART/USB
• Watchdog: Yes

6.3.1.3
20
AT89C5132
Waveforms
Table 8. External 8-bit Bus Cycle – Data Write AC Timings
V
Figure 6-8.
DD
Symbol
T
T
T
T
T
T
T
T
T
T
WLWH
QVWH
WHQX
WHLH
AVWL
CLCL
LHLL
AVLL
LLAX
LLWL
= 2.7 to 3.3V, T
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
ALE
RD
P0
P2
External 8-bit Bus Cycle – Data Read Waveforms
A
= -40° to +85°C
T
LHLL
T
AVLL
A7:0
T
AVRL
T
2·T
3·T
6·T
4·T
7·T
T
T
LLAX
T
T
T
T
T
RLAZ
LLRL
CLCL
CLCL
CLCL
CLCL
AVDV
CLCL
CLCL
CLCL
CLCL
CLCL
Min
50
Standard Mode
Variable Clock
-20
-20
-20
-15
-15
-30
-25
-30
-20
T
RLDV
T
CLCL
Max
T
A15:8
RLRH
+20
Data In
0.5·T
0.5·T
1.5·T
0.5·T
3.5·T
0.5·T
D7:0
3·T
2·T
T
CLCL
CLCL
CLCL
Min
50
CLCL
CLCL
CLCL
CLCL
CLCL
CLCL
T
RHDX
-15
T
Variable Clock
-25
-30
RHDZ
-20
-20
-30
-20
-20
-15
T
X2 Mode
RHLH
0.5·T
Max
CLCL
4173ES–USB–09/07
+20
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns