SC2200 datasheet(70/433 Pages) NSC

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Revision 3.0

Signal Definitions (Continued)

2.4.11 Serial Ports (UARTs) Interface Signals

Signal Name

Ball No.

Type

Description

Mux

EBGA

TEPBGA

SIN1

D26

AG2

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-

tion(s) but not used, then signal(s)

should be tied high.

---

SIN2

AJ4

E28

SDTEST3

SIN3

J28

AK8

IRRX1

SOUT1

B27

AF3

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.

CLKSEL1 (Strap)

SOUT2

AK3

D29

CLKSEL2 (Strap)

SOUT3

C11

IRTX

RTS2#

AH4

C30

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.

GPIO7+

IDE_DACK1#

CTS2#

AJ2

C31

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.

GPIO8+

IDE_DREQ1

DTR1#/BOUT1

A28

AG1

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

GPIO18

DTR2#/BOUT2

AH3

D28

GPIO6+IDE_IOR1#

RI2#

H30

AJ8

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.

GPIO11+IRQ15

DCD2#

AG4

C28

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.

GPIO9+IDE_IOW1#

+SDTEST2

DSR2#

AJ1

B29

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

used, tie DSR2# low.

GPIO10+

IDE_IORDY1

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