HT46RU25 Holtek Semiconductor Inc., HT46RU25 Datasheet - Page 12

• Manufacturer Part Number: HT46RU25
• Description: Ht46ru25/ht46cu25 -- A/d Type 8-bit Mcu
• Manufacturer: Holtek Semiconductor Inc.

Rev. 1.30
External Interrupt
Timer/Event Counter 0 Overflow
Timer/Event Counter 1 Overflow
UART Bus Interrupt
I
Multi-function Interrupt
(Timer/event counter 2 / Real time
clock / Time base overflow)
2
C Bus Interrupt
Bit No.
Bit No.
Bit No.
3, 7
3, 7
0
1
2
3
4
5
6
7
0
1
2
4
5
6
0
1
2
4
5
6
Interrupt Source
Label
Label
Label
EURI
EMFI
URIF
ETBI
ERTI
ET0I
ET1I
MFF
ET2I
TBF
RTF
EMI
T0F
T1F
T2F
EEI
EHI
HIF
EIF
Controls the master (global) interrupt (1=enable; 0= disable)
Controls the external interrupt (1=enable; 0=disable)
Controls the Timer/Event Counter 0 interrupt (1=enable; 0=disable)
Controls the Timer/Event Counter 1 interrupt (1=enable; 0=disable)
External interrupt request flag (1=active; 0=inactive)
Internal Timer/Event Counter 0 request flag (1=active; 0=inactive)
Internal Timer/Event Counter 1 request flag (1=active; 0=inactive)
For test mode used only.
Must be written as 0 ; otherwise may result in unpredictable operation.
Control the UART interrupt (1=enable; 0=disable)
Control the I
Control the Multi-function interrupt (1=enable; 0=disable)
Unused bit, read as 0
UART request flag (1=active; 0=inactive)
I
Multi-function interrupt request flag (1=active; 0=inactive)
Control the Timer/Event Counter 2 interrupt (1=enable; 0=disable)
Control the time base interrupt (1=enable; 0=disable)
Control the real time clock interrupt (1=enable; 0=disable)
Unused bit, read as 0
Timer/Event Counter 2 interrupt request flag (1=active; 0=inactive)
Time base interrupt request flag (1=active; 0=inactive)
Real time clock interrupt request flag (1=active; 0=inactive)
2
C Bus interrupt request flag (1=active; 0=inactive)
Priority Vector
1
2
3
4
5
6
2
C Bus interrupt (1=enable; 0=disable)
INTC0 (0BH) Register
INTC1 (1EH) Register
MFIC (2FH) Register
0CH
04H
08H
10H
14H
18H
12
Once the interrupt request flags, composed of EIF, T0F,
T1F, URIF, HIF and MFF, are set, they will remain in the
INTC0 and INTC1 registers until the interrupts are ser-
viced or cleared by a software instruction.
It is recommended that a program does not use the
rupts often occur in an unpredictable manner or need to
be serviced immediately in some applications. If only one
stack is left and enabling the interrupt is not well con-
trolled, the original control sequence will be damaged
once the CALL operates in the interrupt subroutine.
CALL subroutine within the interrupt subroutine. Inter-
Function
Function
Function
HT46RU25/HT46CU25
March 9, 2007