T89C51RD2-SMSIM Atmel, T89C51RD2-SMSIM Datasheet - Page 41

• Manufacturer Part Number: T89C51RD2-SMSIM
• Description: IC MICRO CTRL 64K FLASH 68PLCC
• Manufacturer: Atmel
• Series: 89Cr

Specifications of T89C51RD2-SMSIM

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 48
• Program Memory Size: 64KB (64K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 2K x 8
• Ram Size: 1.25K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 68-PLCC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Data Converters: -

4243G–8051–05/03
Table 25. IPH Register
IPH - Interrupt Priority High Register (B7h)
Reset Value = X000 0000b
Not bit addressable
Number
Bit
7
6
5
4
3
2
1
0
7
-
Mnemonic
PPCH
PX1H
PX0H
PT2H
PT1H
PT0H
PSH
Bit
PPCH
-
6
Reserved
The value read from this bit is indeterminate. Do not set this bit.
PCA interrupt priority bit high.
PPCH
0
Timer 2 overflow interrupt Priority High bit
PT2H
Serial port Priority High bit
Timer 1 overflow interrupt Priority High bit
PT1H
External interrupt 1 Priority High bit
PX1H
Timer 0 overflow interrupt Priority High bit
PT0H
External interrupt 0 Priority High bit
PX0H
PSH
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
PT2H
5
PPC
0
1
0
1
PT2 Priority Level
0
1
0
1
PS
0
1
0
1
PT1 Priority Level
0
1
0
1
PX1 Priority Level
0
1
0
1
PT0
0
1
0
1
PX0
0
1
0
1
Lowest
Highest
Priority Level
Lowest
Highest
Lowest
Highest
Lowest
Highest
PSH
Lowest
Highest
Priority Level
Lowest
Highest
Priority Level
Lowest
Highest
Priority Level
4
PT1H
3
Description
PX1H
2
T89C51RD2
PT0H
1
PX0H
0
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