参数资料
型号: SM8521
厂商: Sharp Corporation
元件分类: DC/DC变换器
英文描述: 1 watt dc-dc converters
中文描述: 1瓦的DC - DC转换器
文件页数: 24/56页
文件大小: 267K
代理商: SM8521
SM8521
Table 3 SM8521 Interrupt Vectors Location and Their Priority
VECTOR LOCATION
1000
H
1002
H
1006
H
1008
H
100E
H
1012
H
1016
H
101A
H
101C
H
101E
H
T
he priority levels determine the order in which the chip process simultaneous interrupts. It also denotes the priority level of
mask interrupts by setting the bits IM2-IM0 (bits 2-0 : PS0).
INTERRUPT SOURCE
SYMBOL
DMAINT
TIM0INT
EXTINT
UARTINT
LCDCINT
TIM1INT
CKINT
PIOINT
WDTINT
NMIINT, ILLINT
PRIORITY
1
2
3
4
5
6
7
8
DMA
Timer 0
External interrupt
UART transmit/receive complete
LCD controller
Timer 1
Clock
Input/output port
Watchdog timer overflow
NMI, illegal instruction
REGISTER EXPLANATIONS
PS0 (Interrupt maskbit (IM) of processor status0)
The bits IM2-IM0 can set the acceptable level for
interrupt. The maskable interrupt requested by CPU
is set 1 to 8 priority levels. These bits IM2-IM0
determine processing interrupts which priority
levels.
Bits 2 to 0 : Interrupt mask bits (IM2-IM0)
BIT
000
All maskable interrupts recognized.
001
All maskable interrupts recognized.
Maskable interrupts with 1 to 7 level
recognized.
Maskable interrupts with 1 to 6 level
recognized.
Maskable interrupts with 1 to 5 level
recognized.
Maskable interrupts with 1 to 4 level
recognized.
Maskable interrupts with 1 to 3 level
recognized.
Maskable interrupts with 1 to 2 level
recognized.
NOTE :
When an interrupt enables by interrupt mask bit, if all
interrupt conditions are setup, then the CPU starts to the
interrupt processing.
CONTENT
010
011
100
101
110
111
- 24 -
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