mpc235 Megawin Technology, mpc235 Datasheet - Page 11

• Manufacturer Part Number: mpc235
• Description: Low-speed Usb Micro-controller
• Manufacturer: Megawin Technology

Interrupt Vectors
There are seven interrupt sources provided in MPC235. The flag IRQ_EN and IRQ_ST are used to
control the interrupts. When flag IRQ_ST is set to ‘1’ by hardware and the corresponding bits of flag
IRQ_EN has been set by firmware, an interrupt is generated. When an interrupt occurs, all of the
interrupts are inhibited until the CLI or STA IRQ_EN, #I instruction is invoked. Executing the SEI
instruction can also disable the interrupts.
MEGAWIN
Vector Address
800CH, 800DH
800AH, 800BH
800EH, 800FH
8000H, 8001H
8002H, 8003H
8006H, 8007H
8008H, 8009H
Interrupt signal
Interrupt signal
trigger signal
BRK
USB
P05
.
.
.
RESET
S
S
S
STA IRQ_EN, #I
R
R
R
BRK
USB
Item
TM0
P04
P05
P3
Q
Q
Q
IRQ_ST.1
IRQ_ST.5
IRQ_ST.0
MPC235 Technical Summary
Priority
2
1
3
4
5
6
7
Initial Reset
STA IRQ_CLR, #I
CLI instruction
IRQ_EN.0
IRQ_EN.1
IRQ_EN.5
Initial Reset
Properties
Ext.
Ext.
Ext.
Ext.
Int.
Int.
Int.
Disable
Software BRK interrupt vector
Initial reset
USB interrupt
Timer 0 overflow interrupt
Port P3 interrupt vector
Port P0.4 interrupt vector
Port P0.5 interrupt vector
Interrupt
Process
Logic
Enable
Generator
Interrupt
Vector
Logic
SEI instruction
Memo
800CH, 800DH
800AH, 800BH
800EH, 800FH
8000H, 8001H
8002H, 8003H
8006H, 8007H
8008H, 8009H
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