st2024c Sitronix Technology Corporation, st2024c Datasheet - Page 11

• Manufacturer Part Number: st2024c
• Description: 24k 8-bit Single Chip Microcontroller
• Manufacturer: Sitronix Technology Corporation

9.3
Interrupt request flag can be cleared by two methods. One is
to write “0” to IREQ, the other is to initiate the interrupt
Ver 2.2
Address Name
Address Name
$03C
$03E
Bit 5:
Bit 4:
Bit 3:
Bit 1:
Bit 0:
Bit 5:
Bit 4:
Bit 3:
Bit 1:
Bit 0:
Interrupt request clear
IREQ
IENA
1 = Time base interrupt occurs
1 = Port-A transition interrupt occurs
1 = Timer1 overflow interrupt occurs
1 = DAC time out interrupt occurs
1 = INTX edge interrupt occurs
1 = Time base interrupt enable
1 = Port-A transition interrupt enable
1 = Timer1 overflow interrupt enable
1 = DAC time out interrupt enable
1 = INTX edge interrupt enable
IRBT: Base Timer Interrupt Request bit
IRPT: Port-A Interrupt Request bit
IRT1: Timer1 Interrupt Request bit
IRDAC: DAC reload Interrupt Request bit
IRX: INTX Interrupt Request bit
IEBT: Base Timer Interrupt Enable bit
IEPT: Port-A Interrupt Enable bit
IET1: Timer1 Interrupt Enable bit
IEDAC: DAC reload Interrupt Enable bit
IEX: INTX Interrupt Enable bit
0 = Time base interrupt doesn’t occur
0 = Port-A transition interrupt doesn’t occur
0 = Timer1 overflow interrupt doesn’t occur
0 = DAC time out interrupt doesn’t occur
0 = INTX edge interrupt doesn’t occur
0 = Time base interrupt disable
0 = Port-A transition interrupt disable
0 = Timer1 overflow interrupt disable
0 = DAC time out interrupt disable
0 = INTX edge interrupt disable
R/W
R/W
R/W
R/W
TABLE 9-4: INTERRUPT REQUEST REGISTER (IREQ)
TABLE 9-5: INTERRUPT ENABLE REGISTER (IENA)
Bit 7
Bit 7
-
-
Bit 6
Bit 6
-
-
Bit 5
Bit 5
IRBT
IEBT
11/54
Bit 4
Bit 4
IRPT
IEPT
service routine when interrupt occurs. Hardware will
automatically clear the Interrupt flag.
Bit 3
Bit 3
IRT1
IET1
Bit 2
Bit 2
-
-
IRDAC
IEDAC
Bit 1
Bit 1
Bit 0
Bit 0
IRX
IEX
- - 11 1-11
- - 00 0-00
ST2024C
Default
Default
1/31/08