
cExpress-BT2 Page 21
3.3.7. Express Card
Signal Pin # Description I/O PU/PD Comment
EXCD0_CPPE#
EXCD1_CPPE#
A49
B48
PCI ExpressCard: PCI Express capable card request I 3.3V PU 10k 3.3V
EXCD0_PERST#
EXCD1_PERST#
A48
B47
PCI ExpressCard: reset O 3.3V
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#
B8
B9
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 Atom clock 33 MHz
Celeron clock 25 MHz
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
B37
USB differential data pairs for Port 6 I/O 3.3VSB Not supported
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
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