T89C51RD2-SLSIM Atmel, T89C51RD2-SLSIM Datasheet - Page 41
T89C51RD2-SLSIM
Manufacturer Part Number
T89C51RD2-SLSIM
Description
IC MICRO CTRL 64K FLASH 44PLCC
Manufacturer
Atmel
Series
89Cr
Datasheet
1.T89C51RD2-SMSIM.pdf
(104 pages)
Specifications of T89C51RD2-SLSIM
Core Processor
8051
Core Size
8-Bit
Speed
40MHz
Connectivity
SPI, UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
32
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
44-PLCC
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Data Converters
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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
41
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