AT87C51RD2-SLSUL Atmel, AT87C51RD2-SLSUL Datasheet - Page 67
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AT87C51RD2-SLSUL
Manufacturer Part Number
AT87C51RD2-SLSUL
Description
IC 8051 MCU 64K OTP 30MHZ 44PLCC
Manufacturer
Atmel
Series
87Cr
Datasheet
1.TS87C51RB2-VIA.pdf
(86 pages)
Specifications of AT87C51RD2-SLSUL
Core Processor
8051
Core Size
8-Bit
Speed
30/20MHz
Connectivity
UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
32
Program Memory Size
64KB (64K x 8)
Program Memory Type
OTP
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
44-PLCC
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Data Converters
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
11.5.5
Figure 11-7. External Data Memory Write Cycle
11.5.6
4188F–8051–01/08
External Data Memory Write Cycle
External Data Memory Read Cycle
PORT 0
PORT 2
PSEN
ALE
WR
Table 11-9.
OR SFR-P2
ADDRESS
Symbol
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
WLWH
QVWX
QVWH
WHQX
RHDX
AVWL
WHLH
WHLH
RLRH
RLDV
RHDZ
AVDV
LLDV
LLWL
LLWL
RLAZ
AC Parameters for a Variable Clock: derating formula
Type
Max
Max
Max
Max
Max
Max
Max
Min
Min
Min
Min
Min
Min
Min
Min
Min
A0-A7
T
T
LLAX
AVWL
Standard
3 T + x
6 T - x
6 T - x
5 T - x
2 T - x
8 T - x
9 T - x
3 T - x
4 T - x
7 T - x
Clock
T
T + x
T - x
T - x
T - x
LLWL
x
x
ADDRESS A8-A15 OR SFR P2
X2 Clock
1.5 T + x
0.5 T + x
2.5 T - x
4.5 T - x
1.5 T - x
0.5 T - x
3.5 T - x
0.5 T - x
0.5 T - x
3 T - x
3 T - x
2 T - x
4T -x
T - x
x
x
T
QVWX
T
-M
20
20
25
20
40
60
25
25
25
15
15
10
15
15
0
0
QVWH
T
DATA OUT
WLWH
15
15
23
15
35
50
20
20
20
10
10
10
10
AT/TS8xC51Rx2
-V
0
8
0
T
WHLH
25
25
30
25
45
65
30
30
30
20
20
15
20
20
-L
0
0
T
WHQX
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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