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Page 22 Express-IBE2

3.3.8. LPC bus

Signal Pin Description I/O PU/PD Comment

LPC_AD[0:3] B4-B7 LPC multiplexed address, command and data bus I/O 3.3V

LPC_FRAME# B3 LPC frame indicates the start of an LPC cycle O 3.3V

LPC_DRQ0#

LPC_DRQ1#

LPC serial DMA request I 3.3V

LPC_SERIRQ A50 LPC serial interrupt I/O OD 3.3V PU 8k2 3.3V

LPC_CLK B10 LPC clock output - 33MHz nominal O 3.3V

3.3.9. USB

Signal Pin Description I/O PU/PD Comment

USB0+

USB0-

A46

A45

USB differential data pairs for Port 0 I/O 3.3VSB USB 1.1/ 2.0 compliant

USB1+

USB1-

B46

B45

USB differential data pairs for Port 1 I/O 3.3VSB USB 1.1/ 2.0 compliant

USB2+

USB2-

A43

A42

USB differential data pairs for Port 1 I/O 3.3VSB USB 1.1/ 2.0 compliant

USB3+

USB3-

B43

B42

USB differential data pairs for Port 2 I/O 3.3VSB USB 1.1/ 2.0 compliant

USB4+

USB4-

A40

A39

USB differential data pairs for Port 3 I/O 3.3VSB USB 1.1/ 2.0 compliant

USB5+

USB5-

B40

B39

USB differential data pairs for Port 4 I/O 3.3VSB USB 1.1/ 2.0 compliant

USB6+

USB6-

A37

A36

USB differential data pairs for Port 5 I/O 3.3VSB USB 1.1/ 2.0 compliant

USB7+

USB7-

B37

USB differential data pairs for Port 6 I/O 3.3VSB USB 1.1/ 2.0 compliant

USB_0_1_OC# B44 USB over-current sense, USB ports 0 and 1. A pull-up

for this line shall be present on the module. An open

drain driver from a USB current monitor on the carrier

board may drive this line low.

I 3.3VSB PU 10k 3.3VSB Do not pull high on carrier

USB_2_3_OC# A44 USB over-current sense, USB ports 2 and 3. A pull-up

for this line shall be present on the module. An open

drain driver from a USB current monitor on the carrier

board may drive this line low.

I 3.3VSB PU 10k 3.3VSB Do not pull high on carrier

USB_4_5_OC# B38 USB over-current sense, USB ports 4 and 5. A pull-up

for this line shall be present on the module. An open

drain driver from a USB current monitor on the carrier

board may drive this line low.

I 3.3VSB PU 10k 3.3VSB Do not pull high on carrier

USB_6_7_OC# A38 USB over-current sense, USB ports 6 and 7. A pull-up

for this line shall be present on the module. An open

drain driver from a USB current monitor on the carrier

board may drive this line low.

I 3.3VSB PU 10k 3.3VSB Do not pull high on carrier

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