AT80C51RD2-SLSIM Atmel, AT80C51RD2-SLSIM Datasheet - Page 47

• Manufacturer Part Number: AT80C51RD2-SLSIM
• Description: IC MCU 8051 5V SPI 20MHZ 44-PLCC
• Manufacturer: Atmel
• Series: 80Cr

Specifications of AT80C51RD2-SLSIM

• 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: 44-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

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
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