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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： | 58/60页 |
| 文件大小： | 1107K |
| 代理商： | MCF54418CMJ250 |
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Hardware design considerations
MCF5441x ColdFire Microprocessor Data Sheet, Rev. 6
Preliminary—Subject to Change Without Notice
Freescale Semiconductor
7
Figure 5 shows an example for bypassing the FlexBus power supply for the MPU. This bypass should be applied to as many
FB_VDD signals as routing allows. Each one should be placed as close to the ball as possible.
Figure 5. FB_VDD power filter
2.2
Supply voltage sequencing
Figure 6 shows requirements in the sequencing of the I/O VDD (EVDD), FlexBus VDD (FBVDD), SDRAM VDD (SDVDD), PLL
VDD (VDD_OSC_A_PLL), and internal logic/core VDD (IVDD).
Figure 6. Supply voltage sequencing and separation cautions
The relationships between FBVDD, SDVDD and EVDD are non-critical during power-up and power-down sequences. FBVDD
(1.8 – 3.3V), SDVDD (2.5V or 1.8V) and EVDD are specified relative to IVDD.
NOTE
All I/O VDD pins must be powered on when the device is functioning, except when in
standby mode.
In standby mode, all I/O VDD pins, except VSTBY_RTC (battery), can be switched off.
Board 1.8–3.3 V
0.1 F
FB_VDD
1 F
GND
supply
EVDD/FBVDD (3.3V)
IVDD, VDD_OSC_A_PLL
Time
3.3V
1.5V
0
D
C
Po
wer
Su
ppl
y
V
olt
age
Notes:
1 Input voltage must not be greater than the supply voltage (EV
DD, FBVDD, SDVDD, IVDD, or PVDD) by more
than 0.5V at any time, including during power-up.
2 Use 25 V/millisecond or slower rise time for all supplies.
2.5V
SDVDD (2.5V — DDR)
1.8V
SDVDD/FBVDD (1.8V — DDR2)
Supplies stable
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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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