參數資料
型號： XE8807AMI026TLF
廠商： Semtech
文件頁數： 101/143頁
文件大?。?/td> 0K
描述： IC MCU LOW PWR MTP FLASH 32-TQFP
標準包裝： 1
系列： XE880x
應用： 感測機
核心處理器： Coolrisc816?
程序存儲器類型： 閃存（11 kB）
控制器系列： XE8000
RAM 容量： 512 x 8
接口： UART，USRT
輸入/輸出數： 24
電源電壓： 2.4 V ~ 5.5 V
工作溫度： -40°C ~ 85°C
安裝類型： 表面貼裝
封裝/外殼： 32-TQFP
包裝： 標準包裝
供應商設備封裝： 32-TQFP（7x7）
產品目錄頁面： 585 (CN2011-ZH PDF)
配用： XE8000MP-ND - PROG BOARD AND PROSTART2 CARD
其它名稱： XE8807AMI026DKR
Semtech 2006
www.semtech.com
9-3
XE8806A/XE8807A
pos.
RegEvnEn
rw
reset
function
7
RegEvnEn[7]
rw
0 nresetglobal
1= enable event #7
6
RegEvnEn[6]
rw
0 nresetglobal
1= enable event #6
5
RegEvnEn[5]
rw
0 nresetglobal
1= enable event #5
4
RegEvnEn[4]
rw
0 nresetglobal
1= enable event #4
3
RegEvnEn[3]
rw
0 nresetglobal
1= enable event #3
2
RegEvnEn[2]
rw
0 nresetglobal
1= enable event #2
1
RegEvnEn[1]
rw
0 nresetglobal
1= enable event #1
0
RegEvnEn[0]
rw
0 nresetglobal
1= enable event #0
Table 9-3: RegEvnEn
pos.
RegEvnPriority
rw
reset
function
7-0
RegEvnPriority
r
11111111
nresetglobal
code of highest event set
FF if no event present.
Table 9-4: RegEvnPriority
pos.
RegEvnEvn
rw
reset
function
7-2
-
r
00000
unused
1
EvnHig
r
0 nresetglobal
one or more high priority event is
set
0
EvnLow
r
0 nresetglobal
one or more low priority event is
set
Table 9-5: RegEvnEvn
9.4
Detailed description
The CoolRISC core has 2 different event levels EV0 and EV1 (Figure 9-1).
The setting and clearing of these events can be done in the stat register (see chapter describing the CPU).
The event handler bundles a certain number of event sources and routes them to one of these two events and
provides the possibility to enable/disable each of them individually. The definition of the event sources is given in
the memory mapping chapter.
RegEvn is an 8-bit register containing flags for the event sources. Those flags are set when the event is enabled
(i.e. if the corresponding bit in the registers RegEvnEn is set) and a rising edge is detected on the corresponding
event source.
Once memorized, writing a ‘1’ in the corresponding bit of RegEvn clears an event flag. Writing a ‘0’ does not modify
the flag. All interrupts are automatically cleared after a reset.
Two registers are provided to facilitate the writing of event service software. RegEvnPriority contains the number
of the highest event set (its value is 0xFF when no event is memorized). RegEvnEvn indicates the priority level of
the current events.
All event sources are sampled by the highest frequency in the system. A CPU event is generated and memorized
when an event becomes high. The 8 event sources are divided into 2 levels of priority: High (4 event sources) and
Low (4 event sources). Those 2 levels of priority are directly mapped to those supported by the CoolRisc (EV0 and
EV1; see CoolRisc documentation for more information).
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