AT80C51RD2-3CSIM Atmel, AT80C51RD2-3CSIM Datasheet - Page 48
AT80C51RD2-3CSIM
Manufacturer Part Number
AT80C51RD2-3CSIM
Description
IC MCU 8051 5V SPI 20MHZ 40-DIP
Manufacturer
Atmel
Series
80Cr
Datasheet
1.AT80C51RD2-RLRUM.pdf
(81 pages)
Specifications of AT80C51RD2-3CSIM
Core Processor
8051
Core Size
8-Bit
Speed
40MHz
Connectivity
UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
32
Program Memory Type
ROMless
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
40-DIP (0.600", 15.24mm)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Program Memory Size
-
Data Converters
-
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AT80C51RD2
Reset Value = X000 0000b
Not bit addressable
Table 12-5.
IE1 - Interrupt Enable Register (B1h)
Number
Bit
7
6
5
4
3
2
1
0
7
-
IE1 Register
Mnemonic Description
PPCH
PT2H
PT1H
PX1H
PT0H
PX0H
PSH
Bit
6
-
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
PCA interrupt priority high bit.
PPCHPPCLPriority Level
0
0
1
1
Timer 2 overflow interrupt priority high bit
PT2HPT2LPriority Level
0
0
1
1
Serial port priority high bit
PSH PSLPriority Level
0
0
1
1
Timer 1 overflow interrupt priority high bit
PT1HPT1LPriority Level
0
0
1
1
External interrupt 1 priority high bit
PX1HPX1LPriority Level
0
0
1
1
Timer 0 overflow interrupt priority high bit
PT0HPT0LPriority Level
0
0
1
1
External interrupt 0 priority high bit
PX0H PX0LPriority Level
0
0
1
1
0Lowest
1
0
1Highest
0Lowest
1
0
1Highest
0Lowest
1
0
1Highest
0 Lowest
1
0
1 Highest
0Lowest
1
0
1Highest
0Lowest
1
0
1Highest
0Lowest
1
0
1Highest
5
-
4
-
3
-
2
-
1
-
4113D–8051–01/09
KBD
0
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