DS3173N datasheet(75/232 Pages) DALLAS

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Table 10-20 to Table 10-22 describe the function selected by the FM bits and other pin mode bits for the

multiplexed pins.

Table 10-20. TSOFIn Input Pin Functions

FM[2:0] PORT.CR2

Pin function

0XX (FSCT)

TSOFIn

1XX (FBM)

Not used

Table 10-21. TSOFOn/TDENn/Output Pin Functions

FM[2:0] PORT.CR2

TSOFOS

PORT.CR3

Pin function

0XX (FSCT)

TDENn

0XX (FSCT)

TSOFOn

1XX (FBM)

Low

Table 10-22. TCLKOn/TGCLKn Output Pin Functions

FM[2:0]

PORT.CR2

TCLKS

PORT.CR3

Pin function

Gap source

0XX (FSCT)

TGCLKn

TDENn

0XX (FSCT)

TCLKOn

none

1XX (FBM)

TCLKOn

none

10.5.8.2 Receive SCT port pins

The receive SCT pins are RSERn, RSOFOn / RDENn and RCLKOn / RGCLKn. They have different functions

based on the framing mode and other pin mode bits. Unused input pin functions should drive a logic zero into the

device circuits expecting a signal from that pin. The control bits that configure these pins are PORT.CR2.FM[2:0],

PORT.CR3.RPFPE, PORT.CR3.RSOFOS and PORT.CR3.RCLKS.

Table 10-23 to Table 10-24 describe the function selected by the FM bits and other pin mode bits for the

multiplexed pins.

Table 10-23. RSOFOn/RDENn Output Pin Functions

FM[2:0]

PORT.CR2

RSOFOS

PORT.CR3

Pin function

0XX (FSCT)

RDENn

0XX (FSCT)

RSOFOn

1XX (CLR)

Low

1XX (CSCT)

High

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