AT87C51RB2-3CSUL Atmel, AT87C51RB2-3CSUL Datasheet - Page 43

• Manufacturer Part Number: AT87C51RB2-3CSUL
• Description: IC 8051 MCU 16K OTP 30MHZ 40DIP
• Manufacturer: Atmel
• Series: 87Cr

Specifications of AT87C51RB2-3CSUL

• 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: 16KB (16K x 8)
• Program Memory Type: OTP
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 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: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -

4188F–8051–01/08
Table 6-19.
Reset Value = X000 0000b
Not bit addressable
Number
Bit
7
6
5
4
3
2
1
0
7
-
IPH Register
IPH - Interrupt Priority High Register (B7h)
PPCH
Mnemonic
6
PPCH
PX1H
PX0H
PT2H
PT1H
PT0H
PSH
Bit
-
PT2H
5
Description
Reserved
The value read from this bit is indeterminate. Do not set this bit.
PCA interrupt priority bit high.
PPCHPPC
Timer 2 overflow interrupt Priority High bit
PT2H PT2
Serial port Priority High bit
Timer 1 overflow interrupt Priority High bit
PT1H PT1Priority Level
External interrupt 1 Priority High bit
PX1HPX1Priority Level
Timer 0 overflow interrupt Priority High bit
PT0H PT0
External interrupt 0 Priority High bit
PX0HPX0
PSH PS
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1 Highest
0
1
0
1
0Lowest
1
0
1Highest
0Lowest
1
0
1Highest
0Lowest
1
0
1Highest
0
1
0
1
0
1
0
1
PSH
4
Lowest
Lowest
Highest
Priority Level
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
Priority Level
Priority Level
PT1H
3
PX1H
AT/TS8xC51Rx2
2
PT0H
1
PX0H
0
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