AT80C51RD2-3CSIM Atmel, AT80C51RD2-3CSIM Datasheet - Page 50

• Manufacturer Part Number: AT80C51RD2-3CSIM
• Description: IC MCU 8051 5V SPI 20MHZ 40-DIP
• Manufacturer: Atmel
• Series: 80Cr

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: -

12.2
50
Interrupt Sources and Vector Addresses
AT80C51RD2
IPH1 - Interrupt Priority High Register (B3h)
Reset Value = XXXX XXX0b
Not bit addressable
Table 12-8.
Number
Number
Bit
7
7
6
5
4
3
2
1
0
-
0
1
2
3
4
5
6
7
8
Interrupt Sources and Vector Addresses
Mnemonic Description
Polling Priority
KBDH
Bit
6
-
-
-
-
-
-
-
-
0
1
2
3
4
6
7
5
8
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Reserved
The value read from this bit is indeterminate. Do not set this bit.
Keyboard interrupt Priority High bit
KB DHKBDLPriority Level
0
0
1
1
0 Lowest
1
0
1 Highest
5
-
Interrupt Source
Keyboard
Timer 0
Timer 1
Timer 2
Reset
UART
INT0
INT1
PCA
4
-
3
-
CF + CCFn (n = 0-4)
TF2+EXF2
Interrupt
Request
KBDIT
RI+TI
TF0
IE0
IE1
IF1
2
-
1
-
4113D–8051–01/09
Address
Vector
000Bh
001Bh
002Bh
003Bh
0000h
0003h
0013h
0023h
0033h
KBDH
0