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80C32E View Datasheet(PDF) - Philips Electronics

Part NameDescriptionManufacturer
80C32E CMOS single-chip 8-bit microcontrollers Philips
Philips Electronics Philips
80C32E Datasheet PDF : 62 Pages
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Philips Semiconductors
CMOS single-chip 8-bit microcontrollers
Product specification
80C32/87C52
Interrupts
The 80C32/87C52 has 6 interrupt sources. All except TF2 and EXF2
are identical sources to those in the 80C51.
The Interrupt Enable Register and the Interrupt Priority Register are
modified to include the additional 80C32/87C52 interrupt sources.
The operation of these registers is identical to the 80C51.
In the 80C32/87C52, the Timer 2 Interrupt is generated by the
logical OR of TF2 and EXF2. Neither of these flags is cleared by
hardware when the service routine is vectored to. In fact, the service
routine may have to determine whether it was TF2 or EXF2 that
generated the interrupt, and the bit will have to be cleared in
software.
All of the bits that generate interrupts can be set or cleared by
software, with the same result as though it has been set or cleared
by hardware. That is, interrupts can be generated or pending
interrupts can be canceled in software.
The interrupt vector addresses and the interrupt priority for requests
in the same priority level are given in the following:
Source
Vector Priority Within
Address
Level
1. IE0
0003H (highest)
2. TF0
000BH
3. IE1
0013H
4. TF1
001BH
5. RI + TI
0023H
6. TF2 + EXF2 002BH
(lowest)
Note that they are identical to those in the 80C51 except for the
addition of the Timer 2 (TF1 and EXF2) interrupt at 002BH and at
the lowest priority within a level.
Table 3.
Timer 2 as a Timer
MODE
16-bit Auto-Reload
16-bit Capture
Baud rate generator receive and transmit same baud rate
Receive only
Transmit only
T2CON
INTERNAL CONTROL
(Note 1)
EXTERNAL CONTROL
(Note 2)
00H
08H
01H
09H
34H
36H
24H
26H
14H
16H
Table 4. Timer 2 as a Counter
MODE
TMOD
INTERNAL CONTROL
(Note 1)
EXTERNAL CONTROL
(Note 2)
16-bit
02H
0AH
Auto-Reload
03H
0BH
NOTES:
1. Capture/reload occurs only on timer/counter overflow.
2. Capture/reload occurs on timer/counter overflow and a 1-to-0 transition on T2EX (P1.1) pin except when timer 2 is used in the baud rate
generator mode.
1996 Aug 16
11
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