ADUC812 Analog Devices, ADUC812 Datasheet - Page 38

• Manufacturer Part Number: ADUC812
• Description: Precision Analog Microcontroller: 1.3MIPS 8052 MCU + 8kB Flash + 8-Ch 12-Bit ADC + Dual 12-Bit DAC
• Manufacturer: Analog Devices

Specifications of ADUC812

• Mcu Core: 8052
• Mcu Speed (mips): 1.3
• Sram (bytes): 256Bytes
• Gpio Pins: 34
• Adc # Channels: 8

ADuC812
INTERRUPT SYSTEM
The ADuC812 provides a total of nine interrupt sources with two priority levels. The control and configuration of the interrupt system
is carried out through three interrupt related SFRs.
IE
IP
IE2
IE
SFR Address
Power-On Default Value
Bit Addressable
Bit
7
6
5
4
3
2
1
0
IP
SFR Address
Power-On Default Value
Bit Addressable
Bit
7
6
5
4
3
2
1
0
P
E
S
A
I
Name
EA
EADC
ET2
ES
ET1
EX1
ET0
EX0
Name
PSI
PADC
PT2
PS
PT1
PX1
PT0
PX0
E
P
Interrupt Enable Register
Interrupt Priority Register
Secondary Interrupt Enable Register
A
A
D
D
C
C
Written by user to enable “1” or disable “0” ADC interrupt.
Written by user to enable “1” or disable “0” External Interrupt 1.
Written by user to enable “1” or disable “0” External Interrupt 0.
Written by user to select ADC interrupt priority (“1” = High; “0” = Low).
Written by user to select Timer 2 interrupt priority (“1” = High; “0” = Low).
Written by user to select Timer 1 interrupt priority (“1” = High; “0” = Low).
Written by user to select Timer 0 interrupt priority (“1” = High; “0” = Low).
Interrupt Enable
Register
A8H
00H
Yes
Description
Written by user to enable “1” or disable “0” all interrupt sources.
Written by user to enable “1” or disable “0” Timer 2 interrupt.
Written by user to enable “1” or disable “0” UART serial port interrupt.
Written by user to enable “1” or disable “0” Timer 1 interrupt.
Written by user to enable “1” or disable “0” Timer 0 interrupt.
Interrupt Priority
Register
B8H
00H
Yes
Description
Written by user to select I
Written by user to select UART serial port interrupt priority (“1” = High; “0” = Low).
Written by user to select External Interrupt 1 priority (“1” = High; “0” = Low).
Written by user to select External Interrupt 0 priority (“1” = High; “0” = Low).
E
P
T
T
2
2
Table XXIII. IP SFR Bit Designations
Table XXII. IE SFR Bit Designations
E
P
S
S
2
C/SPI priority (“1” = High; “0” = Low).
–38–
E
P
T
T
1
1
E
P
X
X
1
1
E
P
T
T
0
0
E
P
X
X
0
0
REV. E