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参数资料
| 型号： | MCF54418CMJ250 |
| 厂商： | FREESCALE SEMICONDUCTOR INC |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | MICROPROCESSOR, PBGA256 |
| 封装： | 12 X 12 MM, ROHS COMPLAINT, MAPBGA-256 |
| 文件页数： | 18/60页 |
| 文件大小： | 1107K |
| 代理商： | MCF54418CMJ250 |
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Electrical characteristics
MCF5441x ColdFire Microprocessor Data Sheet, Rev. 6
Preliminary—Subject to Change Without Notice
Freescale Semiconductor
25
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 10 to enable Full 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
11
DDR2 High Strength
10
DDR2 Full Strength
01
Not supported
00
Not supported
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| MCF54418CMJ250 | 制造商:Freescale Semiconductor 功能描述:IC 32-BIT MPU COLDFIRE 250MHZ 256-MA |
| MCF5441X | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:MCF5441x ColdFire Microprocessor Data Sheet |
| MCF54450 | 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:ColdFire㈢ Microprocessor |
| MCF54450ACVM180 | 制造商:Freescale Semiconductor 功能描述:MCF5445X RISC 32-BIT 180MHZ 1.8V/2.5V/3.3V 256-PIN MA-BGA BR - Trays 制造商:Freescale Semiconductor 功能描述:MCF5445X V4M CORE, MMU, 制造商:Freescale 功能描述:MPU MCF5445X RISC 32-Bit 180MHz 1.8V/2.5V/3.3V 256-Pin MAP-BGA Brick |
| MCF54450AVM240 | 制造商:Freescale Semiconductor 功能描述:MCF5445X RISC 32-BIT 240MHZ 1.8V/2.5V/3.3V 256-PIN MA-BGA BR - Trays |
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