參數(shù)資料
型號(hào): EP7311-IB
廠商: Cirrus Logic Inc
文件頁數(shù): 32/42頁
文件大?。?/td> 0K
描述: IC ARM720T MCU 74MHZ 256-PBGA
標(biāo)準(zhǔn)包裝: 90
系列: EP7
核心處理器: ARM7
芯體尺寸: 32-位
速度: 74MHz
連通性: 編解碼器,EBI/EMI,IrDA,鍵盤,多媒體編解碼器,SPI/Microwire1,UART/USART
外圍設(shè)備: LCD,LED,MaverickKey,PWM
輸入/輸出數(shù): 27
程序存儲(chǔ)器類型: ROMless
RAM 容量: 56K x 8
電壓 - 電源 (Vcc/Vdd): 2.3 V ~ 2.7 V
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 256-BGA
包裝: 托盤
其它名稱: 598-1226
38
4341H–MP3–10/07
AT8xC51SND2C/MP3B
Table 9-2.
Priority Levels
A low-priority interrupt is always interrupted by a higher priority interrupt but not by another inter-
rupt of lower or equal priority. Higher priority interrupts are serviced before lower priority
interrupts. The response to simultaneous occurrence of equal priority interrupts is determined by
an internal hardware polling sequence detailed in Table 9-3. Thus, within each priority level
there is a second priority structure determined by the polling sequence. The interrupt control
system is shown in Figure 9-1.
Table 9-3.
Priority within Same Level
IPHxx
IPLxx
Priority Level
0
0 Lowest
0
1
0
2
1
3 Highest
Interrupt Name
Priority Number
Interrupt Address Vectors
Interrupt Request Flag
Cleared by Hardware (H)
or by Software (S)
INT0
0 (Highest Priority)
C:0003h
H if edge, S if level
Timer 0
1
C:000Bh
H
INT1
2
C:0013h
H if edge, S if level
Timer 1
3
C:001Bh
H
Serial Port
4
C:0023h
S
MP3 Decoder
5
C:002Bh
S
Audio Interface
6
C:0033h
S
MMC Interface
7
C:003Bh
S
Two Wire Controller
8
C:0043h
S
SPI Controller
9
C:004Bh
S
A to D Converter
10
C:0053h
S
Keyboard
11
C:005Bh
S
Reserved
12
C:0063h
-
USB
13
C:006Bh
S
Reserved
14 (Lowest Priority)
C:0073h
-
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