t89c51rd2-slscl ATMEL Corporation, t89c51rd2-slscl Datasheet - Page 92

• Manufacturer Part Number: t89c51rd2-slscl
• Description: 0 To 40 Mhz Flash Programmable 8-bit Microcontroller
• Manufacturer: ATMEL Corporation

Flash EEPROM Programming
and Verification Waveforms
External Clock Drive
Characteristics (XTAL1)
Table 54. AC Parameters
External Clock Drive
Waveforms
AC Testing Input/Output
Waveforms
92
T
CHCX
Symbol
T
T
T
T
T
CHCX
CLCX
CLCH
CHCL
CLCL
/T
T89C51RD2
CLCX
ALE/PROG
CONTROL
(ENABLE)
P1.0-P1.7
P2.0-P2.4
P3.4-P3.5
INPUT/OUTPUT
SIGNALS
P0
Parameter
Oscillator Period
High Time
Low Time
Rise Time
Fall Time
Cyclic ratio in X2 mode
0.45V
V
CC
-0.5V
0.2V
V
T
DVGL
T
CC
0.7V
AVGL
0.45 V
CC
-0.5 V
T
GLGH
CC
-0.1
T
CHCL
T
EHAZ
PROGRAMMING
ADDRESS
DATA IN
T
CLCX
0.2 V
0.2 V
T
GHDX
T
CC
CC
GHAX
+ 0.9
- 0.1
T
CLCL
T
Min
25
40
ELQV
5
5
T
CLCH
T
VERIFICATION
CHCX
ADDRESS
DATA OUT
T
AVQV
Max
60
5
5
T
EHQZ
4243G–8051–05/03
Units
ns
ns
ns
ns
ns
%