MCF548x ColdFire Microprocessor, Rev. 4 Hardware Design Considerations Freescale" />
參數(shù)資料
型號: MCF5485CVR200
廠商: Freescale Semiconductor
文件頁數(shù): 31/34頁
文件大?。?/td> 0K
描述: IC MPU 32BIT COLDF 388-PBGA
標(biāo)準(zhǔn)包裝: 40
系列: MCF548x
核心處理器: Coldfire V4E
芯體尺寸: 32-位
速度: 200MHz
連通性: CAN,EBI/EMI,以太網(wǎng),I²C,SPI,UART/USART,USB
外圍設(shè)備: DMA,PWM,WDT
輸入/輸出數(shù): 99
程序存儲器類型: ROMless
RAM 容量: 32K x 8
電壓 - 電源 (Vcc/Vdd): 1.43 V ~ 1.58 V
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 388-BBGA
包裝: 托盤
MCF548x ColdFire Microprocessor, Rev. 4
Hardware Design Considerations
Freescale Semiconductor
6
4
Hardware Design Considerations
4.1
PLL Power Filtering
To further enhance noise isolation, an external filter is strongly recommended for PLL analog VDD pins. The filter shown in
Figure 2 should be connected between the board VDD and the PLL VDD pins. The resistor and capacitors should be placed as
close to the dedicated PLL VDD pin as possible.
Figure 2. System PLL VDD Power Filter
4.2
Supply Voltage Sequencing and Separation Cautions
Figure 3 shows situations in sequencing the I/O VDD (EVDD), SDRAM VDD (SD VDD), PLL VDD (PLL VDD), and Core VDD
(IVDD).
USB PLL operation voltage range
USB_PLLVDD
1.43
1.58
V
Input high voltage SSTL 3.3V/2.5V2
VIH
VREF + 0.3
SD VDD + 0.3
V
Input low voltage SSTL 3.3V/2.5V2
VIL
VSS - 0.3
VREF - 0.3
V
Input high voltage 3.3V I/O pins
VIH
0.7 x EVDD
EVDD + 0.3
V
Input low voltage 3.3V I/O pins
VIL
VSS - 0.3
0.35 x EVDD
V
Output high voltage IOH = 8 mA, 16 mA,24 mA
VOH
2.4
V
Output low voltage IOL = 8 mA, 16 mA,24 mA
5
VOL
—0.5
V
Capacitance 3, Vin =0 V, f = 1 MHz
CIN
—TBD
pF
Input leakage current
Iin
–1.0
1.0
μA
1 IV
DD and PLL VDD should be at the same voltage. PLL VDD should have a filtered input. Please see Figure 2 for an
example circuit. There are three PLL VDD inputs. A filter circuit should used on each PLL VDD input.
2 This specification is guaranteed by design and is not 100% tested.
3 Capacitance C
IN is periodically sampled rather than 100% tested.
Table 4. DC Electrical Specifications (continued)
Characteristic
Symbol
Min
Max
Units
Board VDD
10
Ω
0.1 F
PLL VDD Pin
10 F
GND
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