參數(shù)資料
型號: MCF54416CMJ250
廠商: Freescale Semiconductor
文件頁數(shù): 36/61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
Electrical characteristics
MCF5441x ColdFire Microprocessor Data Sheet, Rev. 8
Freescale Semiconductor
41
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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