AT80C51RD2-3CSIM Atmel, AT80C51RD2-3CSIM Datasheet - Page 47
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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4113D–8051–01/09
Reset Value = 0000 0000b
Bit addressable
Table 12-3.
IPL0 - Interrupt Priority Register (B8h)
Reset Value = X000 0000b
Bit addressable
Table 12-4.
IPH0 - Interrupt Priority High Register (B7h)
Number
Bit
7
7
7
6
5
4
3
2
1
0
-
-
IPL0 Register
IPH0 Register
Mnemonic Description
PPCH
PPCL
PPCL
PX1L
PX0L
PT2L
PT1L
PT0L
PSL
Bit
6
6
-
Reserved
The value read from this bit is indeterminate. Do not set this bit.
PCA interrupt priority bit
Refer to PPCH for priority level.
Timer 2 overflow interrupt priority bit
Refer to PT2H for priority level.
Serial port priority bit
Refer to PSH for priority level.
Timer 1 overflow interrupt priority bit
Refer to PT1H for priority level.
External interrupt 1 priority bit
Refer to PX1H for priority level.
Timer 0 overflow interrupt priority bit
Refer to PT0H for priority level.
External interrupt 0 priority bit
Refer to PX0H for priority level.
PT2H
PT2L
5
5
PSH
PSL
4
4
PT1H
PT1L
3
3
PX1L
PX1H
2
2
AT80C51RD2
PT0L
PT0H
1
1
PX0H
PX0L
0
0
47
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