參數資料
型號: MC9328MX21VMR2
廠商: Freescale Semiconductor
文件頁數: 61/100頁
文件大?。?/td> 0K
描述: IC MCU I.MX21 266MHZ 289-MAPBGA
標準包裝: 1,000
系列: i.MX21
核心處理器: ARM9
芯體尺寸: 32-位
速度: 266MHz
連通性: 1 線,EBI/EMI,I²C,IrDA,MMC,智能卡,SPI,SSI,UART/USART,USB OTG
外圍設備: DMA,I²S,LCD,POR,PWM,WDT
輸入/輸出數: 192
程序存儲器類型: ROMless
電壓 - 電源 (Vcc/Vdd): 1.45 V ~ 3.3 V
振蕩器型: 外部
工作溫度: 0°C ~ 70°C
封裝/外殼: 289-LFBGA
包裝: 帶卷 (TR)
Specifications
MC9328MX21 Technical Data, Rev. 3.4
Freescale Semiconductor
63
3.19
External Interface Module (EIM)
The External Interface Module (EIM) handles the interface to devices external to the i.MX21, including
generation of chip-selects for external peripherals and memory. The timing diagram for the EIM is shown
in Figure 53, and Table 43 defines the parameters of signals.
Figure 53. EIM Bus Timing Diagram
1a
1b
2a
2b
3b
3a
4a
4b
4c
4d
5a
5b
5c
5d
6a
6b
6c
7a
7b
7c
8a
8b
9b
9c
9a
7d
(HCLK) Bus Clock
Address
Chip-select
Read (Write)
OE (rising edge)
LBA (negated rising edge)
OE (falling edge)
Burst Clock (rising edge)
LBA (negated falling edge)
EB (falling edge)
EB (rising edge)
Burst Clock (falling edge)
Read Data
Write Data (negated falling)
Write Data (negated rising)
DTACK
10a
11
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