Express-SL2
Pinouts and Signal Descriptions
17
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
Chipset has internal
pull-up
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
Not supported
LPC_SERIRQ A50
LPC serial interrupt
I/O OD
3.3V
PU 10k
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
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
Содержание Express-SL2
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