cs5535 National Semiconductor Corporation, cs5535 Datasheet - Page 38

• Manufacturer Part Number: cs5535
• Description: Geode Cs5535 Companion Multi-function South Bridge
• Manufacturer: National Semiconductor Corporation

www.national.com
Signal Definitions
2.2.4
Note 1. Use external 27 Ω series resistor on output. From reset, these outputs are in TRI-STATE. At board level, a 15 kΩ
Note 2. External clamping diodes may be needed to meet over voltage requirements.
Signal Name
USB_PWR_EN1
USB_PWR_EN2
USB_OC_SENS#
USB1_1_DATPOS
USB1_1_DATNEG
USB1_2_DATPOS
USB1_2_DATNEG
USB2_1_DATPOS
USB2_1_DATNEG
USB2_2_DATPOS
USB2_2_DATNEG
AV
AV
SS_USB
DD_USB
USB Interface
pull-down resistor is required per the USB specification.
F16, J16,
F17, J17,
Ball No.
(Continued)
M16
M17
P17
N16
N15
K16
K17
H17
H16
G17
G16
L16
L17
APWR
AGND
Type
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
O
I
Description
USB Power Enable 1. This signal is intended to be used to enable an
external USB power source for Port 1, such as the National LM3526.
USB_PWR_EN1 is an active high signal. If low, it indicates that the
external USB power source for Port 1 is turned off. Defaults off from
reset.
USB Power Enable 2. This signal is intended to be used to enable an
external USB power source for Port 2, such as the National LM3526.
USB_PWR_EN2 is an active high signal. If low, it indicates that the
external USB power source for Port 2 is turned off. Defaults off from
reset.
USB Over Current Sense. This signal is the logical OR or wired-OR
from all external USB power supply devices, such as the National
LM3526, and is shared by USB1 and USB2 (all four ports). When
pulled low it causes both USB_PWR_EN1 and USB_PWR_EN2 to
de-assert and generate an interrupt. Tie high if not used.
USB Port 1_1 Data Positive. This is the positive differential side of
the USB data for port 1_1. (Note 1, Note 2.)
USB Port 1_1 Data Negative. This is the negative differential side of
the USB data for port 1_1. (Note 1, Note 2.)
USB Port 1_2 Data Positive. This is the positive differential side of
the USB data for port 1_2. (Note 1, Note 2.)
USB Port 1_2 Data Negative. This is the negative differential side of
the USB data for port 1_2. (Note 1, Note 2.)
USB Port 2_1 Data Positive. This is the positive differential side of
the USB data for port 2_1. (Note 1, Note 2.)
USB Port 2_1 Data Negative. This is the negative differential side of
the USB data for port 2_1. (Note 1, Note 2.)
USB Port 2_2 Data Positive. This is the positive differential side of
the USB data for port 2_2. (Note 1, Note 2.)
USB Port 2_2 Data Negative. This is the negative differential side of
the USB data for port 2_2. (Note 1, Note 2.)
USB Analog Circuit Ground. Total of three ground balls for the USB
transceivers. Most applications should connect this to signal ground.
USB Analog Circuit Power. Total of three power balls for the USB
transceivers. Most applications should connect this to V
38
IO
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Revision 0.8