参数资料
型号: 73S1215F-EB-LITE
厂商: Maxim Integrated Products
文件页数: 69/136页
文件大小: 0K
描述: BOARD EVAL 73S1215F CBL/DOC/CD
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 1
系列: *
73S1215F Data Sheet
DS_1215F_003
38
Rev. 1.4
Table 27: Control Bits for External Interrupts
Enable Bit
Description
Flag Bit
Description
EX0
Enable external interrupt 0
IE0
External interrupt 0 flag
EX1
Enable external interrupt 1
IE1
External interrupt 1 flag
EX2
Enable external interrupt 2
IEX2
External interrupt 2 flag
EX3
Enable external interrupt 3
IEX3
External interrupt 3 flag
EX4
Enable external interrupt 4
IEX4
External interrupt 4 flag
EX5
Enable external interrupt 5
IEX5
External interrupt 5 flag
EX6
Enable external interrupt 6
IEX6
External interrupt 6 flag
1.7.3.4
Power Down Interrupt Logic
The 73S1215F contains special interrupt logic to allow INT0 to wake up the CPU from a power down
(CPU STOP) state. See the Power Control Modes section for details.
1.7.3.5
Interrupt Priority Level Structure
All interrupt sources are combined in groups, as shown in Table 28.
Table 28: Priority Level Groups
Group
0
External interrupt 0
Serial channel 1 interrupt
1
Timer 0 interrupt
External interrupt 2
2
External interrupt 1
External interrupt 3
3
Timer 1 interrupt
External interrupt 4
4
Serial channel 0 interrupt
External interrupt 5
5
External interrupt 6
Each group of interrupt sources can be programmed individually to one of four priority levels by setting or
clearing one bit in the special function register IP0 and one in IP1. If requests of the same priority level
are received simultaneously, an internal polling sequence as per Table 32 determines which request is
serviced first.
IEN enable bits must be set to permit any of these interrupts to occur. Likewise, each interrupt has its
own flag bit that is set by the interrupt hardware
Interrupt Priority 0 Register (IP0): 0xA9
0x00
Table 29: The IP0 Register
MSB
LSB
WDTS
IP0.5
IP0.4
IP0.3
IP0.2
IP0.1
IP0.0
Note: WDTS is not used for interrupt controls.
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