參數(shù)資料
型號: MCF54418CMJ250
廠商: Freescale Semiconductor
文件頁數(shù): 43/61頁
文件大?。?/td> 0K
描述: IC MCU 32BIT 256MAPBGA
標準包裝: 450
系列: MCF5441x
核心處理器: Coldfire V4
芯體尺寸: 32-位
速度: 250MHz
連通性: 1 線,CAN,EBI/EMI,以太網(wǎng),I²C,智能卡,SPI,SSI,UART/USART,USB,USB OTG
外圍設(shè)備: DMA,PWM,WDT
輸入/輸出數(shù): 87
程序存儲器類型: ROMless
RAM 容量: 64K x 8
電壓 - 電源 (Vcc/Vdd): 1.14 V ~ 1.32 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x12b,D/A 2x12b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 256-LBGA
包裝: 托盤
MCF5441x ColdFire Microprocessor Data Sheet, Rev. 8
Electrical characteristics
Freescale Semiconductor
48
4.22.1
Receive signal timing specifications
The following timing specs meet the requirements for MII and RMII interfaces for a range of transceiver devices.
Figure 28. MII/RMII receive signal timing diagram
4.22.2
Transmit signal timing specifications
Table 31. Receive signal timing
Num
Characteristic
MII mode
RMII mode
Unit
Min
Max
Min
Max
RXCLK frequency
25
50
MHz
E1
RXD[n:0], RXDV, RXER to RXCLK setup1
1 In MII mode, n = 3; In RMII mode, n = 1
5—4—
ns
E2
RXCLK to RXD[n:0], RXDV, RXER hold1
5—2—
ns
E3
RXCLK pulse width high
35%
65%
35%
65%
RXCLK period
E4
RXCLK pulse width low
35%
65%
35%
65%
RXCLK period
Table 32. Transmit signal timing
Num
Characteristic
MII mode
RMII mode
Unit
Min
Max
Min
Max
TXCLK frequency
25
50
MHz
E5
TXCLK to TXD[n:0], TXEN, TXER invalid1
1 In MII mode, n = 3; In RMII mode, n = 1
4—5—
ns
E6
TXCLK to TXD[n:0], TXEN, TXER valid1
25
14
ns
E7
TXCLK pulse width high
35%
65%
35%
65%
tTXCLK
E8
TXCLK pulse width low
35%
65%
35%
65%
tTXCLK
Valid Data
RXCLK (MII) / EXTAL (RMII)
RXD[n:0]
RXDV,
RXER
E3
E4
E1
E2
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