Signal Definitions

32580B

3.4.11Serial Ports (UARTs) Interface Signals (Continued)

Signal Name

Ball No.

Type

Description

Mux

 

 

 

 

 

RI2#

AJ8

I

Ring Indicator. When low, indicates to the modem that a

GPIO11+IRQ15

 

 

 

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.

 

 

 

 

 

 

DCD2#

C28

I

Data Carrier Detected. When low, indicates that the

GPIO9+IDE_IOW1#

 

 

 

data transfer device (e.g., modem) is ready to establish a

+SDTEST2

 

 

 

communications link.

 

 

 

 

Note: If selected as DCD2# function but not used, tie

 

 

 

 

DCD2# high.

 

 

 

 

 

 

DSR2#

B29

I

Data Set Ready. When low, indicates that the data trans-

GPIO10+

 

 

 

fer device (e.g., modem) is ready to establish a communi-

IDE_IORDY1

 

 

 

cations link.

 

 

 

 

Note: If selected as DSR2# function but not used, tie

 

 

 

 

DSR2# low.

 

 

 

 

 

 

AMD Geode™ SC2200 Processor Data Book

65

Page 61
Image 61
AMD SC2200 manual GPIO11+IRQ15, DCD2#, GPIO9+IDEIOW1#, +SDTEST2, DSR2#, GPIO10+