MCF5480 Freescale Semiconductor, Inc, MCF5480 Datasheet - Page 10

• Manufacturer Part Number: MCF5480
• Description: Mcf548x Coldfire Microprocessor
• Manufacturer: Freescale Semiconductor, Inc

Output Driver Capability and Loading
4.4.1
The USBRBIAS resistor should be placed as close to the dedicated USB 2.0 pins as possible. The tolerance should be ±1%.
5
Table 6
10
lists values for drive capability and output loading.
Output Driver Capability and Loading
Bias Resistor
1
SDRAMC (SDADDR[12:0], SDDATA[31:0], RAS, CAS, SDDM[3:0],
SDWE, SDBA[1:0]
SDRAMC DQS and clocks (SDDQS[3:0], SDRDQS, SDCLK[1:0],
SDCLK[1:0], SDCKE)
SDRAMC chip selects (SDCS[3:0])
FlexBus (AD[31:0], FBCS[5:0], ALE, R/W, BE/BWE[3:0], OE)
FEC (EnMDIO, EnMDC, EnTXEN, EnTXD[3:0], EnTXER
Timer (TOUT[3:0])
FlexCAN (CANTX)
DACK[1:0]
PSC (PSCnTXD[3:0], PSCnRTS/PSCnFSYNC,
DSPI (DSPISOUT, DSPICS0/SS, DSPICS[2:3], DSPICS5/PCSS)
PCI (PCIAD[31:0], PCIBG[4:1], PCIBG0/PCIREQOUT, PCIDEVSEL,
PCICXBE[3:0], PCIFRM, PCIPERR, PCIRESET, PCISERR, PCISTOP,
PCIPAR, PCITRDY, PCIIRDY
I2C (SCL, SDA)
BDM (PSTCLK, PSTDDATA[7:0], DSO/TDO,
RSTO
The device’s pads have balanced sink and source current. The drive capability is the same as
the sink capability.
MCF548x ColdFire
Figure 7. USBRBIAS Connection
Table 6. I/O Driver Capability
Signal
USBRBIAS
®
Microprocessor, Rev. 4
9.1kΩ
1
Capability
24 mA
24 mA
16 mA
24 mA
16 mA
24 mA
Drive
8 mA
8 mA
8 mA
8 mA
8 mA
8 mA
8 mA
8 mA
Load (C
Freescale Semiconductor
Output
15 pF
15 pF
15 pF
30 pF
15 pF
50 pF
30 pF
30 pF
30 pF
50 pF
50 pF
50 pF
25 pF
50 pF
L
)