P80C32EBBB PHILIPS [NXP Semiconductors], P80C32EBBB Datasheet - Page 11

• Manufacturer Part Number: P80C32EBBB
• Description: CMOS single-chip 8-bit microcontrollers
• Manufacturer: PHILIPS [NXP Semiconductors]

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
Philips Semiconductors
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
Table 3.
Table 4.
NOTES:
1996 Aug 16
16-bit Auto-Reload
16-bit Capture
Baud rate generator receive and transmit same baud rate
Receive only
Transmit only
CMOS single-chip 8-bit microcontrollers
generator mode.
Timer 2 as a Timer
Timer 2 as a Counter
Auto-Reload
MODE
MODE
16-bit
11
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:
1. IE0
2. TF0
3. IE1
4. TF1
5. RI + TI
6. TF2 + EXF2
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.
INTERNAL CONTROL
INTERNAL CONTROL
Source
(Note 1)
(Note 1)
00H
01H
34H
24H
14H
02H
03H
Address
Vector
0003H
000BH
0013H
001BH
0023H
002BH
Priority Within
T2CON
TMOD
(highest)
(lowest)
Level
EXTERNAL CONTROL
EXTERNAL CONTROL
80C32/87C52
(Note 2)
(Note 2)
Product specification
08H
09H
36H
26H
16H
0AH
0BH