st2032a Sitronix Technology Corporation, st2032a Datasheet - Page 12

• Manufacturer Part Number: st2032a
• Description: 8 Bit Microcontroller With 32k Bytes Rom
• Manufacturer: Sitronix Technology Corporation

9.2 Interrupt Request Flag
Interrupt request flag can be cleared by two methods. One is to
write “ 0” to IREQ, the other is to initiate the interrupt service
Ver 2.4
Address Name
Address Name
$03C
$03E
Bit 5: IRBT: Base Timer Interrupt Request bit
Bit 4: IRPT: Port-A Interrupt Request bit
Bit 3: IRT1: Timer1 Interrupt Request bit
Bit 5: IEBT: Base Timer Interrupt Enable bit
Bit 4: IEPT: Port-A Interrupt Enable bit
Bit 3: IET1: Timer1 Interrupt Enable bit
IREQ
IENA
1 = Time base interrupt occurs
0 = Time base interrupt doesn’ t occur
1 = Port-A transition interrupt occurs
0 = Port-A transition interrupt doesn’ t occur
1 = Timer1 overflow interrupt occurs
0 = Timer1 overflow interrupt doesn’ t occur
1 = Time base interrupt enable
0 = Time base interrupt disable
1 = Port-A transition interrupt enable
0 = Port-A transition interrupt disable
1 = Timer1 overflow interrupt enable
0 = Timer1 overflow interrupt disable
*R/W
R/W
R/W
R/W
Bit 7
Bit 7
-
-
TABLE 9-2 Interrupt Request Register (IREQ)
Bit 6
TABLE 9-3 Interrupt Enable Register (IENA)
Bit 6
-
-
IRBT
Bit 5
Bit 5
IEBT
12/54
IRPT
IEPT
Bit 4
Bit 4
Bit 2: IRT0: Timer0 Interrupt Request bit
Bit 1: IRDAC: DAC reload Interrupt Request bit
Bit 0: IRX: INTX Interrupt Request bit
Bit 2: IET0: Timer0 Interrupt Enable bit
Bit 1: IEDAC: DAC reload Interrupt Enable bit
Bit 0: IEX: INTX Interrupt Enable bit
routine when interrupt occurs. Hardware will automatically clear
the Interrupt flag.
1 = Timer0 overflow interrupt occurs
0 = Timer0 overflow interrupt doesn’ t occur
1 = DAC time out interrupt occurs
0 = DAC time out interrupt doesn’ t occur
1 = INTX edge interrupt occurs
0 = INTX edge interrupt doesn’ t occur
Bit 3
IRT1
Bit 3
IET1
1 = Timer0 overflow interrupt enable
0 = Timer0 overflow interrupt disable
1 = DAC time out interrupt enable
0 = DAC time out interrupt disable
1 = INTX edge interrupt enable
0 = INTX edge interrupt disable
Bit 2
Bit 2
IRT0
IET0
IRDAC
IEDAC
Bit 1
Bit 1
Bit 0
Bit 0
IRX
IEX
- - 00 0000
- - 00 0000
Default
Default
ST2032A
9/13/07