參數(shù)資料
型號: ST52F514F0M6
英文描述: IC MAX 7000 CPLD 160 100-TQFP
中文描述: 微控制器
文件頁數(shù): 42/106頁
文件大?。?/td> 648K
代理商: ST52F514F0M6
ST52F510/F513/F514
42/106
Low Priority Register (INT_PRL_L)
Configuration Register 4 (04h) Read/Write
Reset Value: 1000 1000 (088h)
These three register are used to configure the
priority level of each interrupt source. The 24 bits
of these registers (PRL24-PRL0) are divided into 8
groups of three bits: each group is associated with
a priority level (from level 1, the highest, to level 8,
the lowest: level 0 is fixed for the NMI that can be
interrupted only by the TRAP) . The three bits of
each group are written with the code number
associated with the interrupt source (see Table
5.1).
PRL2-PRL1
: Interrupt priority level 1 (highest)
PRL5-PRL3
: Interrupt priority level 2
PRL8-PRL6
: Interrupt priority level 3
PRL11-PRL9
:Interrupt priority level 4
PRL14-PRL12
: Interrupt priority level 5
PRL17-PRL15
: Interrupt priority level 6
PRL20-PRL18
: Interrupt prioritylevel 7
PRL23-PRL21
: Interrupt priority level 8 (lowest)
Example: writing the code 110 into PRL8-PRL6
bits the priority level 3 is assigned to the Port A
Interrupt.
Warning:
the Priority Level configuration registers
must be always configured.
7
0
PRL7
PRL6
PRL5
PRL4
PRL3
PRL2
PRL1
PRL0
Table 5.1 Interrupt sources paramethers
Interrupt Source
Priority type
PRL code
RINT code
Maskable
Vector Addresses
A/D Converter
Programmable
000
0
Yes
3-5 (03h-05h)
PWM/Timer 0
Programmable
001
1
Yes
6-8 (06h-08h)
PWM/Timer 1
Programmable
010
2
Yes
9-11 (09h-0Bh)
SCI
Programmable
011
3
Yes
12-14 (0Ch-0Eh)
SPI
Programmable
100
4
Yes
15-17 (0Fh-011h)
I
2
C Interface
Programmable
101
5
Yes
18-20 (012h-014h)
Port A
Programmable
110
6
Yes
21-23 (015h-017h)
Port B
Programmable
111
7
Yes
24-26 (018h-01Ah)
NMI
Fixed
-
8
No
27-29 (01Bh-01Dh)
TRAP
Fixed to highest
-
-
No
30-32 (01Eh-020h)
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