MPC89L51A Megawin Technology, MPC89L51A Datasheet - Page 22
MPC89L51A
Manufacturer Part Number
MPC89L51A
Description
8-bit micro-controller
Manufacturer
Megawin Technology
Datasheet
1.MPC89L51A.pdf
(38 pages)
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IE2: Interrupt 2 Edge flag. Sets by hardware when external interrupt edge detected. Cleared when interrupt
PX3: If set, Set priority for external interrupt 3 higher
EX3: If set, Enables external interrupt 3.
IE3: Interrupt 3 Edge flag. Sets by hardware when external interrupt edge detected. Cleared when
IT3: Interrupt 3 type control bits. Set/Cleared by software to specified falling edge/low level triggered
PX2: If set, Set priority for external interrupt 3 higher
EX2: If set, enables external interrupt 2.
IT2: Interrupt 2 types control bits. Set/Cleared by software to specify falling edge/low level triggered
IP (or XICON) and IPH are combined to form 4-level priority interrupt as the following table.
SFR: XICON (External Interrupt Control):
Watchdog Timer
22
WIDL
ENW
IDLE
Bits-7
PX3
interrupt processed.
interrupt.
interrupt.
processed.
CLK/12
{IPH.x , IP.x}
10
01
00
11
Bits-6
EX3
Bits-5
IE3
8-bit pre-scalar timer
CLRW
Priority
Level
1 (highest)
2
3
4
MPC89x51A Data Sheet
Bits-4
IT3
PS0
PS1
PS2
Bits-3
PX2
8
Bits-2
EX2
Bits-1
IE2
15-bit WDT
Bits-0
IT2
RESET
MEGAWIN
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