参数资料
型号: MC68HC05G1B
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP56
封装: SDIP-56
文件页数: 62/124页
文件大小: 732K
代理商: MC68HC05G1B
MOTOROLA
5-8
MC68HC05G1
INTERRUPTS
5
5.5
Miscellaneous Control Register ($27)
IRQN
1 (set)
Edge triggering for IRQ only
0 (clear) –
Level and edge triggering for IRQ
INT1N
1 (set)
Edge triggering for INT1 only
0 (clear) –
Level and edge triggering for INT1
INT2N
1 (set)
Edge triggering for INT2 only
0 (clear) –
Level and edge triggering for INT2
5.6
Programmable Timer Interrupt
Three timer interrupt ags are found in the four most signicant bits of the Timer Status register
(TSR) at location $13. All three interrupts will vector to the same address at location
$3FF6-$3FF7.
Each ag bit is dened as follows:
TOF - Timer Overow Flag
TOF is set during the Counter transition of $FFFF to $0000. It is cleared by
reading the TSR (with TOF set) followed by reading the counter least signicant
byte ($19). Reset does not affect this bit.
OCF - Output Compare Flag
OCF is set when the Output Compare Register matches the Counter Register. It
is cleared by reading the TSR (with OCF set) and then accessing the Output
Compare Register least signicant byte ($17). Reset does not affect this bit.
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
$27
INT2N
INT1N
IRQN
TIMI
WDOG
0000 ---0
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
Timer Status Register
$13
ICF
OCF
TOF
uuu- ----
TPG
40
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