MC68HC711PH8 Motorola, MC68HC711PH8 Datasheet - Page 151

• Manufacturer Part Number: MC68HC711PH8
• Description: High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcomputer Unit
• Manufacturer: Motorola

8.1.4.9
Use this 8-bit register to enable or inhibit timer overflow and real-time interrupts. The timer
prescaler control bits are included in this register.
Note:
TOI — Timer overflow interrupt enable
RTII — Real-time interrupt enable (refer to Section 8.1.5)
PAOVI — Pulse accumulator overflow interrupt enable (refer to Section 8.1.8)
PAII — Pulse accumulator input edge interrupt enable (refer to Section 8.1.8)
Bits [3, 2] — Not implemented; always read zero.
PR[1:0] — Timer prescaler select
These bits are used to select the prescaler divide-by ratio. In normal modes, PR[1:0] can only be
written once, and the write must be within 64 cycles after reset. See Table 8-1 for specific timing
values.
MC68HC11PH8
Timer interrupt mask 2 (TMSK2)
1 (set)
0 (clear) –
1 (set)
0 (clear) –
Bits in TMSK2 correspond bit for bit with flag bits in TFLG2. Ones in TMSK2 enable the
corresponding interrupt sources.
TMSK2 — Timer interrupt mask register 2
–
–
Timer overflow interrupt requested when TOF is set.
TOF interrupts disabled.
Real time interrupt requested when RTIF is set.
Real time interrupts disabled.
Address
$0024
bit 7
TOI
TIMING SYSTEM
PR[1:0]
0 0
0 1
1 0
1 1
bit 6
RTII
Prescaler
PAOVI
bit 5
16
1
4
8
bit 4
PAII
bit 3
0
bit 2
0
PR1
bit 1
bit 0
PR0
MOTOROLA
0000 0000
on reset
State
TPG
8-17
8