參數(shù)資料
型號(hào)： HT49C50
廠商： Holtek Semiconductor Inc.
元件分類： 8位微控制器
英文描述： 8-BIT MICROCONTROLLER
中文描述： 8位微控制器
文件頁(yè)數(shù)： 14/52頁(yè)
文件大?。?/td> 318K
代理商： HT49C50
HT49C50
14
August 18, 1999
Once an interrupt subroutine is serviced, other
interrupts are all blocked (by clearing the EMI
bit). This scheme may prevent any further in-
terrupt nesting. Other interrupt requests may
take place during this interval, but only the in-
terrupt request flag will be recorded. If a cer-
tain interrupt requires servicing within the
service routine, the EMI bit and the correspond-
ing bit of the INTC0 or of INTC1 may be set in
ordertoallowinterruptnesting.Oncethestackis
full, the interrupt request will not be acknowl-
edged, even if the related interrupt is enabled,
untiltheSPisdecremented.Ifimmediateservice
isdesired,thestackshouldbepreventedfrombe-
coming full.
All these interrupts can support a wake-up
function. As an interrupt is serviced, a control
transfer occurs by pushing the contents of the
PC onto the stack followed by a branch to a sub-
Register
Bit No.
Label
Function
INTC0
(0BH)
0
EMI
Control the master (global) interrupt
(1=enabled; 0=disabled)
1
EEI0
Control the external interrupt 0
(1=enabled; 0=disabled)
2
EEI1
Control the external interrupt 1
(1=enabled; 0=disabled)
3
ET0I
Control the timer/event counter 0 interrupt
(1=enabled; 0=disabled)
4
EIF0
External interrupt 0 request flag
(1=active; 0=inactive)
5
EIF1
External interrupt 1 request flag
(1=active; 0=inactive)
6
T0F
Internal timer/event counter 0 request flag
(1=active; 0=inactive)
7
Unused bit, read as 0
INTC1
(1EH)
0
ET1I
Control the timer/event counter 1 interrupt
(1=enabled; 0=disabled)
1
ETBI
Control the time base interrupt
(1=enabled; 0:disabled)
2
ERTI
Control the real time clock interrupt
(1=enabled; 0:disabled)
3
Unused bit, read as 0
4
T1F
Internal timer/event counter 1 request flag
(1=active; 0=inactive)
5
TBF
Time base request flag
(1=active; 0=inactive)
6
RTF
Real time clock request flag
(1=active; 0=inactive)
7
Unused bit, read as 0
INTC register
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