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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： | 35/60页 |
| 文件大小： | 1107K |
| 代理商： | MCF54418CMJ250 |
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MCF5441x ColdFire Microprocessor Data Sheet, Rev. 6
Preliminary—Subject to Change Without Notice
Electrical characteristics
Freescale Semiconductor
40
4.16.2.2
Cards with active-low reset
The sequence of reset for this kind of card is as follows (see Figure 23):
1. After powerup, the clock signal is enabled on SIM_CLK (time T0)
2. After 200 clock cycles, RX must be high.
3. SIM_RST must remain low for at least 40,000 clock cycles after T0 (no response is to be received on RX during those
40,000 clock cycles)
4. SIM_RST is set high (time T1)
5. SIM_RST must remain high for at least 40,000 clock cycles after T1 and a response must be received on RX between
400 and 40,000 clock cycles after T1.
Figure 23. Active-low-reset card reset sequence
4.16.3
Power-down sequence
Power down sequence for SIM interface is as follows:
1. SIM_PD port detects the removal of the SIM card
2. SIM_RST goes low
3. SIM_CLK goes low
4. SIM_TX goes low
5. SIM_VEN goes low
Each of these steps is completed in one CKIL period (usually 32 kHz). Power-down may be started in response to a
card-removal detection or launched by the processor. Figure 24 and Table 23 show the usual timing requirements for this
sequence, with Fckil = CKIL frequency value.
SIM_VEN
SIM_CLK
SIM_RX
2
T0
1
Response
SIM_RST
T1
1
2
< 200 clock cycles
< 40,000 clock cycles
400 clock cycles <
3
400,000 clock cycles <
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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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