AMD Geode SC1200 Data Book page 62

32579B
3.4.11 Universal Serial Bus (USB) Interface Signals
Signal Name Ball No.
POWER_EN AH1
OVER_CUR# AF4
DPOS_PORT1 A28
DNEG_PORT1 A29
DPOS_PORT2 B27
DNEG_PORT2 B28
DPOS_PORT3 A26
DNEG_PORT3 A27
1. A 15 KΩ pull-down resistor is required on all ports (even if unused).
3.4.12 Serial Ports (UARTs) Interface Signals
Signal Name Ball No.
SIN1 AG2
SIN2 E28
SIN3 AK8
SOUT1 AF3
SOUT2 D29
SOUT3 C11
RTS2# C30
CTS2# C31
DTR1#/BOUT1 AG1
DTR2#/BOUT2 D28
62
Type Description
O Power Enable. This signal enables the power to a self-
powered USB hub.
I Overcurrent. This signal indicates that the USB hub has
detected an overcurrent on the USB.
I/O
USB Port 1 Data Positive for Port 1.
I/O
USB Port 1 Data Negative for Port 1.
I/O
USB Port 2 Data Positive for Port 2.
I/O
USB Port 2 Data Negative for Port 2.
I/O
USB Port 3 Data Positive for Port 3.
I/O
USB Port 3 Data Negative for Port 3.
Type Description
I Serial Inputs. Receive composite serial data from the
communications link (peripheral device, modem or other
data transfer device).
Note: If selected as SIN2 or SIN3 function(s) but not
used, then signal(s) should be tied high.
O Serial Outputs. Send composite serial data to the com-
munications link (peripheral device, modem or other data
transfer device). These signals are set active high after a
system reset.
O Request to Send. When low, indicates to the modem or
other data transfer device that the corresponding UART
is ready to exchange data. A system reset sets these sig-
nals to inactive high, and loopback operation holds them
inactive.
I Clear to Send. When low, indicates that the modem or
other data transfer device is ready to exchange data.
Note: If selected as CTS2# function but not used, tie
CTS2# low.
O Data Terminal Ready Outputs. When low, indicate to
the modem or other data transfer device that the UART is
ready to establish a communications link. After a system
reset, these balls provide the DTR# function and set
these signals to inactive high. Loopback operation drive
them inactive.
Baud Outputs. Provide the associated serial channel
baud rate generator output signal if test mode is selected
(i.e., bit 7 of the EXCR1 Register is set).
1
1
1
1
1
1
AMD Geode™ SC1200/SC1201 Processor Data Book
Signal Definitions
Mux
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Mux
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SDTEST3
IRRX1
CLKSEL1 (Strap)
CLKSEL2 (Strap)
IRTX
GPIO7+
IDE_DACK1#
GPIO8+
IDE_DREQ1
GPIO18
GPIO6+IDE_IOR1#