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4-1
CHAPTER 4
STANDARD AND PTS INTERRUPTS
4.1 INTERRUPT SOURCES, VECTORS, AND PRIORITIES
The interrupt structure of the 87C196CB is the same as that of the 8XC196NT. The only differ-
ence is that INT13, which was reserved on the 8XC196NT, supports the CAN peripheral.
Table 4-1 lists the 87C196CB’s interrupts sources, default priorities (30 is highest and 0 is low-
est), and vector addresses. Figures 4-1 and 4-2 illustrate the interrupt mask and pending registers.
Table 4-1. Interrupt Sources, Vectors, and Priorities
Interrupt Source Mnemonic
Interrupt Controller
Service
PTS Service
Nonmaskable Interrupt NMI INT15 FF203EH 30 — — —
EXTINT Pin EXTINT INT14 FF203CH 14 PTS14 FF205CH 29
CAN CAN INT13 FF203AH 13 PTS13
†
FF205AH 28
SIO Receive RI INT12 FF2038H 12 PTS12 FF2058H 27
SIO Transmit TI INT11 FF2036H 11 PTS11 FF2056H 26
SSIO Channel 1 Transfer SSIO1 INT10 FF2034H 10 PTS10 FF2054H 25
SSIO Channel 0 Transfer SSIO0 INT09 FF2032H 09 PTS09 FF2052H 24
Slave Port Command Buff Full CBF INT08 FF2030H 08 PTS08 FF2050H 23
Unimplemented Opcode — — FF2012H — — — —
Software TRAP Instruction — — FF2010H — — — —
Slave Port Input Buff Full IBF INT07 FF200EH 07 PTS07 FF204EH 22
Slave Port Output Buff Empty OBE INT06 FF200CH 06 PTS06 FF204CH 21
A/D Conversion Complete AD_DONE INT05 FF200AH 05 PTS05 FF204AH 20
EPA Capture/Compare 0 EPA0 INT04 FF2008H 04 PTS04 FF2048H 19
EPA Capture/Compare 1 EPA1 INT03 FF2006H 03 PTS03 FF2046H 18
EPA Capture/Compare 2 EPA2 INT02 FF2004H 02 PTS02 FF2044H 17
EPA Capture/Compare 3 EPA3 INT01 FF2002H 01 PTS01 FF2042H 16
EPA Capture/Compare 4–9,
EPA 0–9 Overrun,
EPA Compare 0–1,
Timer 1 Overflow,
Timer 2 Overflow
EPA
x
INT00 FF2000H 00 PTS00
†
FF2040H 15
†
PTS service is not recommended because the PTS cannot determine the source of shared interrupts.