IC89E54 Datasheet, PDF (11/36 Pages) Integrated Circuit Solution Inc – 8-BITS SINGLE MICROCONTROLLER with 16/32/64-Kbytes of FLASH, 256 byte +512 byte RAM

IC89E54/58/64
The timers/counters
Refer to IC80C32 data sheet.
The serial interface
Refer to IC80C32 data sheet.
The interrupt system
There are 8 interrupt vectors in 44 pins package and 6 interrupt vectors in 40 pins package. Eight interrupt vectors only
exist in IC89E54/58/64 series. INT2 and INT3 are new interrupts that add on standard IC80C32. The interrupt information
shows in Table 3. The interrupt architecture shows in figure 10. External interrupt 2 and 3 control register is XICON shown
in following.
Two additional external interrupts, INT2 and INT3, whose function are similar to those of external interrupt 0 and 1 in
the standard 80C32. The functions/status of these interrupts are determined/shown by the bits in the XICON(External
Interrupt Control) register. The XICON register is bit-addressable but is not a standard register in the 80C32. Its address
is at 0C0H. To set/clear bits in the XICON register, one can use the “SETB (/CLR) bit” instruction.
Table 3. Eight interrupt information
Interrupt Source
Vector Address
Polling Sequence
within priority leve
External Interrupt 0
03H
0 (Highest)
Timer/Counter 0
0BH
1
External Interrupt 1
13H
2
Timer/Counter 1
1BH
3
Serial Port
23H
4
Timer/Counter 2
2BH
5
External Interrupt 2 ⁽¹⁾
33H
6
External Interrupt 3 ⁽¹⁾
3BH
7 (Lowest)
Note:
1. Interrupt 2 and interrupt 3 exist in IC89E54/58/64 44 pins package.
Enable Required
Settings
IE.0
IE.1
IE.2
IE.3
IE.4
IE.5
XICON.2
XICON.6
Interrupt Type
Edge/Level
TCON.0
-
TCON.2
-
-
-
XICON.0
XICON.3
Integrated C ircuitSolution Inc.
11
MC012-0C 11/16/2001