HT46R068B/HT46R069B
Enhanced A/D Type 8-bit OTP MCU
Interrupts
Interrupts are an important part of any microcontroller system. When an external event or an
internal function such as a Timer/Event Counter or Time Base requires microcontroller attention,
their corresponding interrupt will enforce a temporary suspension of the main program allowing
the microcontroller to direct attention to their respective needs.
The device contains a single external interrupt and multiple internal interrupts. The external
interrupt is controlled by the action of the external interrupt pin, while the internal interrupts are
generated by the various functions such as Timer/Event Counters, and Time Base.
Interrupt Register
Overall interrupt control, which means interrupt enabling and request flag setting, is controlled
by using two registers, INTC0 and INTC1. By controlling the appropriate enable bits in this
registers each individual interrupt can be enabled or disabled. Also when an interrupt occurs, the
corresponding request flag will be set by the microcontroller. The global enable flag if cleared to
zero will disable all interrupts.
● INTC0 Register
Bit
Name
R/W
7
6
5
4
EIF
R/W
0
3
2
1
EEI
R/W
0
0
－
－
－
T1F
R/W
0
T0F
R/W
0
ET1I
R/W
0
ET0I
R/W
0
EMI
R/W
0
POR
Bit 7
unimplemented, read as “0”
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
T1F: Timer/Event Counter 1 interrupt request flag
0: inactive
1: active
T0F: Timer/Event Counter 0 interrupt request flag
0: inactive
1: active
EIF: External interrupt request flag
0: inactive
1: active
ET1I: Timer/Event Counter 1 interrupt enable
0: disable
1: enable
ET0I: Timer/Event Counter 0 interrupt enable
0: disable
1: enable
EEI: External interrupt enable
0: disable
1: enable
EMI: Master interrupt global enable
0: disable
1: enable
Rev. 1.00
7ꢃ
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HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
