參數(shù)資料
型號: ST52F513Y2B6
廠商: STMICROELECTRONICS
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 24 MHz, MICROCONTROLLER, PDIP16
封裝: PLASTIC, DIP-16
文件頁數(shù): 44/106頁
文件大?。?/td> 648K
代理商: ST52F513Y2B6
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.
70
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)
I2C 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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