ADUC841BSZ62-3 Datasheet, PDF (70/88 Pages) Analog Devices – MicroConverter® 12-Bit ADCs and DACs with Embedded High Speed 62-kB Flash MCU

ADuC841/ADuC842/ADuC843
INTERRUPT SYSTEM
The ADuC841/ADuC842/ADuC843 provide 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
Interrupt Enable Register
IP
Interrupt Priority Register
IEIP2
Secondary Interrupt Enable Register
IE
SFR Address
Power-On Default
Bit Addressable
Interrupt Enable Register
A8H
00H
Yes
Table 35. IE SFR Bit Designations
Bit No.
Name
Description
7
EA
Set by the user to enable, or cleared to disable all interrupt sources.
6
EADC
Set by the user to enable, or cleared to disable ADC interrupts.
5
ET2
Set by the user to enable, or cleared to disable Timer 2 interrupts.
4
ES
Set by the user to enable, or cleared to disable UART serial port interrupts.
3
ET1
Set by the user to enable, or cleared to disable 0 Timer 1 interrupts.
2
EX1
Set by the user to enable, or cleared to disable External Interrupt 1.
1
ET0
Set by the user to enable, or cleared to disable Timer 0 interrupts.
0
EX0
Set by the user to enable, or cleared to disable External Interrupt 0 .
IP
SFR Address
Power-On Default
Bit Addressable
Interrupt Priority Register
B8H
00H
Yes
Table 36. IP SFR Bit Designations
Bit No. Name Description
7
----
Reserved.
6
PADC
Written by the user to select the ADC interrupt priority (1 = High; 0 = Low).
5
PT2
Written by the user to select the Timer 2 interrupt priority (1 = High; 0 = Low).
4
PS
Written by the user to select the UART serial port interrupt priority (1 = High; 0 = Low).
3
PT1
Written by the user to select the Timer 1 interrupt priority (1 = High; 0 = Low).
2
PX1
Written by the user to select External Interrupt 1 priority (1 = High; 0 = Low).
1
PT0
Written by the user to select the Timer 0 interrupt priority (1 = High; 0 = Low).
0
PX0
Written by the user to select External Interrupt 0 priority (1 = High; 0 = Low).
Rev. 0 | Page 70 of 88