參數(shù)資料
型號: MCF54418CMJ250
廠商: Freescale Semiconductor
文件頁數(shù): 19/61頁
文件大?。?/td> 0K
描述: IC MCU 32BIT 256MAPBGA
標(biāo)準(zhǔn)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
26
4.7
DDR pad drive strengths
The DDR pins on the MCF5441x devices have programmable drive strengths. Table 13 lists the drive strengths for pins based
on the value programmed into the appropriate field of the drive strength control register. Refer to Table 5 for a list of the external
signals to pad connections.
NOTE
For a single device drive, this setting should be 00 to enable Half Strength mode. High
strength is intended for multiple device drives (DIMM).
msr
11
50
1.2
200
6
10
50
9
200
14
01
50
17
200
23
00
50
110
200
120
fsr
11
50
1.1
200
2.6
10
50
2.4
200
5
01
50
5
200
8
00
50
16
200
21
1 The ae pads are used for USB communication and are governed by usb.org
specifications. They are not included in this table.
Table 13. DDR pad drive strengths
Pad type
Drive strength select
field value
Drive strength
st
00
Half strength 1.8V DDR2
01
Full strength 1.8V DDR2
10
Reserved
11
Reserved
Table 12. Output pad slew rates (continued)
Pad type1
Slew rate select
field value
Drive load
(pF)
Rise/fall time
(ns)
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