M16C/62P Group (M16C/62P, M16C/62PT)
12. Interrupt
Rev.2.41
Jan 10, 2006
Page 119 of 390
REJ09B0185-0241
12.5.10 Interrupt Priority Level Select Circuit
The interrupt priority level select circuit selects the highest priority interrupt when two or more interrupt
requests are sampled at the same sampling point.
Figure 12.10 shows the Interrupts Priority Select Circuit.
Figure 12.10
Interrupts Priority Select Circuit
Timer A2
UART1 reception, ACK1
UART0 reception, ACK0
UART2 reception, ACK2
A/D conversion
DMA1
UART 2 bus collision
SI/O4, INT5
UART1 transmission, NACK1
UART0 transmission, NACK0
UART2 transmission, NACK2
Key input interrupt
DMA0
IPL
I flag
Watchdog timer
DBC
NMI
Interrupt request
accepted
Lowest
Priority of peripheral function interrupts
(if priority levels are same)
Timer B3, UART0 bus collision
Address match
Interrupt request level resolution output to clock
generating circuit (Figure 10.1 Clock Generation Circuit)
SI/O, INT4
Timer B1
INT2
INT0
Timer B4, UART1 bus collision
INT3
Timer B2
Timer B0
Timer A3
INT1
Level 0 (initial value)
Priority level of each interrupt
Highest
Timer A1
Timer A4
Timer B5
Timer A0
Oscillation stop and
re-oscillation detection
Low voltage detection
http://www.xinpian.net
提供单片机解密、IC解密、芯片解密业务
010-62245566 13810019655