AT80C51RD2 Atmel Corporation, AT80C51RD2 Datasheet - Page 72

• Manufacturer Part Number: AT80C51RD2
• Manufacturer: Atmel Corporation

Specifications of AT80C51RD2

• Max. Operating Frequency: 60 MHz
• Cpu: 8051-12C
• Max I/o Pins: 32
• Spi: 1
• Uart: 1
• Sram (kbytes): 1.25
• Operating Voltage (vcc): 2.7 to 5.5
• Timers: 4
• Watchdog: Yes

17.3.8
17.3.9
17.3.10
4113D–8051–01/09
Shift Register Timing Waveforms
External Clock Drive Waveforms
AC Testing Input/Output Waveforms
INSTRUCTION
ALE
CLOCK
OUTPUT DATA
WRITE to SBUF
INPUT DATA
CLEAR RI
Table 17-9.
AC inputs during testing are driven at V
measurement are made at V
T
QVXH
0
INPUT/OUTPUT
0.45V
T
XHDV
V
CC
1
-0.5V
0
AC Parameters for a Variable Clock
VALID
T
XLXL
T
XHQX
2
1
0.2V
VALID
0.7V
Symbol
CC
T
T
T
T
T
QVHX
XHQX
XHDX
XHDV
IH
XLXL
CC
-0.1
T
V
CHCL
T
CC
min for a logic “1” and V
3
XHDX
2
0.45V
-0.5V
VALID
Type
Max
Min
Min
Min
Min
4
CC
3
VALID
- 0.5 for a logic “1” and 0.45V for a logic “0”. Timing
Standard
10 T - x
10 T - x
Clock
2 T - x
T
12 T
CLCX
x
5
4
VALID
IL
0.2 V
0.2 V
X2 Clock
5 T - x
max for a logic “0”.
5 T- x
T - x
T
6 T
6
x
5
CLCL
CC
CC
VALID
+ 0.9
- 0.1
T
CLCH
X Parameter for -
T
7
6
CHCX
VALID
M Range
AT80C51RD2
133
50
20
0
SET TI
SET RI
8
7
VALID
Units
ns
ns
ns
ns
ns
69