AMD Geode SC3200 Data Book page 60

32581C
3.4.11 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
RI2# AJ8
DCD2# C28
DSR2# B29
60
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).
I Ring Indicator. When low, indicates to the modem that a
telephone ring signal has been received by the modem.
They are monitored during power-off for wakeup event
detection.
Note: If selected as RI2# function but not used, tie
RI2# high.
I Data Carrier Detected. When low, indicates that the
data transfer device (e.g., modem) is ready to establish a
communications link.
Note: If selected as DCD2# function but not used, tie
DCD2# high.
I Data Set Ready. When low, indicates that the data trans-
fer device (e.g., modem) is ready to establish a communi-
cations link.
Note: If selected as DSR2# function but not used, tie
DSR2# low.
Signal Definitions
SDTEST3
CLKSEL1 (Strap)
CLKSEL2 (Strap)
GPIO7+
IDE_DACK1#
GPIO8+
IDE_DREQ1
GPIO6+IDE_IOR1#
GPIO11+IRQ15
GPIO9+IDE_IOW1#
+SDTEST2
GPIO10+
IDE_IORDY1
AMD Geode™ SC3200 Processor Data Book
Mux
---
IRRX1
IRTX
GPIO18