参数资料
型号: MCF5474VR266
厂商: Freescale Semiconductor
文件页数: 2/34页
文件大小: 0K
描述: IC MPU 32BIT COLDF 388-PBGA
标准包装: 40
系列: MCF547x
核心处理器: Coldfire V4E
芯体尺寸: 32-位
速度: 266MHz
连通性: EBI/EMI,以太网,I²C,SPI,UART/USART,USB
外围设备: DMA,PWM,WDT
输入/输出数: 99
程序存储器类型: ROMless
RAM 容量: 32K x 8
电压 - 电源 (Vcc/Vdd): 1.43 V ~ 1.58 V
振荡器型: 外部
工作温度: 0°C ~ 70°C
封装/外壳: 388-BBGA
包装: 托盘
MCF547x ColdFire Microprocessor, Rev. 4
Output Driver Capability and Loading
Freescale Semiconductor
10
4.4.1
Bias Resistor
The USBRBIAS resistor should be placed as close to the dedicated USB 2.0 pins as possible. The tolerance should be ±1%.
Figure 7. USBRBIAS Connection
5
Output Driver Capability and Loading
Table 6 lists values for drive capability and output loading.
Table 6. I/O Driver Capability1
1 The device’s pads have balanced sink and source current. The drive capability is the same as
the sink capability.
Signal
Drive
Capability
Output
Load (CL)
SDRAMC (SDADDR[12:0], SDDATA[31:0], RAS, CAS, SDDM[3:0],
SDWE, SDBA[1:0]
24 mA
15 pF
SDRAMC DQS and clocks (SDDQS[3:0], SDRDQS, SDCLK[1:0],
SDCLK[1:0], SDCKE)
24 mA
15 pF
SDRAMC chip selects (SDCS[3:0])
24 mA
15 pF
FlexBus (AD[31:0], FBCS[5:0], ALE, R/W, BE/BWE[3:0], OE)
16 mA
30 pF
FEC (EnMDIO, EnMDC, EnTXEN, EnTXD[3:0], EnTXER
8 mA
15 pF
Timer (TOUT[3:0])
8 mA
50 pF
DACK[1:0]
8 mA
30 pF
PSC (PSCnTXD[3:0], PSCnRTS/PSCnFSYNC,
8 mA
30 pF
DSPI (DSPISOUT, DSPICS0/SS, DSPICS[2:3], DSPICS5/PCSS)
24 mA
50 pF
PCI (PCIAD[31:0], PCIBG[4:1], PCIBG0/PCIREQOUT, PCIDEVSEL,
PCICXBE[3:0], PCIFRM, PCIPERR, PCIRESET, PCISERR, PCISTOP,
PCIPAR, PCITRDY, PCIIRDY
16 mA
50 pF
I2C (SCL, SDA)
8 mA
50 pF
BDM (PSTCLK, PSTDDATA[7:0], DSO/TDO,
8 mA
25 pF
RSTO
8 mA
50 pF
9.1k
Ω
USBRBIAS
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