Programming The Interrupts - Intel 8XC196MC User Manual

8XC196MC, MD, MH USER'S MANUAL
PTS Mode
Single transfer mode
†
register/register
†
memory/register
†
memory/memory
Block transfer mode
†
register/register
†
memory/register
†
memory/memory
A/D scan mode
†
register/register
†
register/memory
ASIO receive mode (MC, MD only)
Majority disabled
Majority enabled
ASIO transmit mode (MC, MD only)
SSIO receive mode (MC, MD only)
SSIO transmit mode (MC, MD only)
†
Register indicates an access to the register file or peripheral SFR. Memory indicates an access to a
memory-mapped register, I/O, or memory. See Table 4-1 on page 4-2 for address information.
5.5

PROGRAMMING THE INTERRUPTS

The PTS select register (PTSSEL) selects either PTS service or a standard software interrupt ser-
vice routine for each of the maskable interrupt requests (see Figure 5-6). The bits in the interrupt
mask registers, INT_MASK and INT_MASK1, enable or disable (mask) individual interrupts
(see Figures 5-7 and 5-8). For the multiplexed interrupt sources, bits in the PI_MASK register
(Figure 5-9 on page 5-17) enable or disable (mask) the individual interrupt sources. With the ex-
ception of the nonmaskable interrupt (NMI) bit (INT_MASK1.7), setting a bit enables the corre-
sponding interrupt source and clearing a bit disables the source.
To disable any interrupt, clear its mask bit. To enable an interrupt for standard interrupt service,
set its mask bit and clear its PTS select bit. To enable an interrupt for PTS service, set both the
mask bit and the PTS select bit.
5-12
Table 5-4. Execution Times for PTS Cycles
18 per byte or word transfer + 1
21 per byte or word transfer + 1
24 per byte or word transfer + 1
13 + 7 per byte or word transfer (1 minimum)
16 + 7 per byte or word transfer (1 minimum)
19 + 7 per byte or word transfer (1 minimum)
21
25
24 + 2 (if parity enabled)
36 + sample time (second sample)
36 + 7 + sample time (third sample)
36 + 2 (if parity enabled)
29 + 3 (if parity enabled)
29 (receive data bit)
21 (no reception)
30 (transmit data bit)
20 (no transmission)
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Execution Time (in State Times)