SC2200 NSC [National Semiconductor], SC2200 Datasheet - Page 70

• Manufacturer Part Number: SC2200
• Description: Thin Client On a Chip
• Manufacturer: NSC [National Semiconductor]

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Signal Definitions
2.4.11 Serial Ports (UARTs) Interface Signals
Signal Name
SIN1
SIN2
SIN3
SOUT1
SOUT2
SOUT3
RTS2#
CTS2#
DTR1#/BOUT1
DTR2#/BOUT2
RI2#
DCD2#
DSR2#
EBGA
AK3
AH4
AH3
AG4
D26
B27
AJ2
A28
H30
AJ4
J28
AJ1
J3
(Continued)
Ball No.
TEPBGA
AG2
AG1
AK8
AF3
D29
C11
C30
C31
D28
C28
E28
AJ8
B29
Type
O
O
O
I
I
I
I
I
Description
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 func-
Serial Outputs. Send composite serial data
to the communications link (peripheral
device, modem or other data transfer device).
These signals are set active high after a sys-
tem reset.
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 signals to
inactive high, and loopback operation holds
them inactive.
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
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).
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
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
Data Set Ready. When low, indicates that
the data transfer device (e.g., modem) is
ready to establish a communications link.
Note: If selected as DSR2# function but not
70
tion(s) but not used, then signal(s)
should be tied high.
used, tie CTS2# low.
used, tie RI2# high.
not used, tie DCD2# high.
used, tie DSR2# low.
GPIO9+IDE_IOW1#
GPIO6+IDE_IOR1#
CLKSEL1 (Strap)
CLKSEL2 (Strap)
GPIO11+IRQ15
IDE_DACK1#
IDE_IORDY1
IDE_DREQ1
+SDTEST2
SDTEST3
GPIO10+
GPIO7+
GPIO8+
GPIO18
IRRX1
IRTX
Mux
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Revision 3.0