AT89C51RB2-RLTCM ATMEL [ATMEL Corporation], AT89C51RB2-RLTCM Datasheet - Page 115
AT89C51RB2-RLTCM
Manufacturer Part Number
AT89C51RB2-RLTCM
Description
8-bit Microcontroller with 16K/ 32K Bytes Flash
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.AT89C51RB2-RLTCM.pdf
(125 pages)
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Shift Register Timing
Waveforms
External Clock Drive
Waveforms
AC Testing Input/Output
Waveforms
Float Waveforms
Clock Waveforms
4180B–8051–04/03
INSTRUCTION
ALE
CLOCK
OUTPUT DATA
WRITE to SBUF
INPUT DATA
CLEAR RI
T
QVXH
0
AC inputs during testing are driven at V
Timing measurement are made at V
For timing purposes as port pin is no longer floating when a 100 mV change from load
voltage occurs and begins to float when a 100 mV change from the loaded V
occurs. I
Valid in normal clock mode. In X2 mode XTAL2 must be changed to XTAL2/2.
T
XHDV
INPUT/OUTPUT
0.45V
1
0
V
VALID
T
CC
XLXL
OL
-0.5V
/I
OH
T
XHQX
2
1
≥ ± 20mA.
VALID
0.2V
0.7V
T
3
CC
XHDX
2
VALID
CC
-0.1
T
V
CHCL
CC
V
V
OH
OL
0.45 V
-0.5V
+ 0.1 V
- 0.1 V
4
3
VALID
IH
min for a logic “1” and V
FLOAT
V
CC
LOAD
5
4
T
VALID
- 0.5 for a logic “1” and 0.45V for a logic “0”.
CLCX
6
5
0.2 V
0.2 V
VALID
AT89C51RB2/RC2
T
CLCL
CC
CC
+ 0.9
- 0.1
7
V
V
6
T
LOAD
LOAD
VALID
CLCH
IL
T
CHCX
max for a logic “0”.
+ 0.1 V
- 0.1 V
SET TI
SET RI
8
7
VALID
OH
/V
OL
level
115
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