DS3172 datasheet(139/232 Pages) DALLAS

139 / 232 page

DS3171/DS3172/DS3173/DS3174

139 of 232

PORT.CR3

Port Control Register 3

(0,2,4,6)44h

Bit #

Name

RCLKS

RSOFOS

RESERVED

TCLKS

TSOFOS

RESERVED

Default

Bit #

Name

P8KRS1

P8KRS0

P8KREF

LOOPT

CLADC

RFTS

TFTS

TLTS

Default

Bit 13: Receive Clock Output Select (RCLKS). This bit is used to select the function of the RGCLKn / RCLKOn

pins. See Table 10-24.

0 = Selects the RGCLKn signal, or the drive low pin function.

1 = Selects RCLKOn signal.

Bit 12: Receive Start Of Frame Output Select (RSOFOS). This bit is to select the function of the RSOFOn /

RDENn pins. See Table 10-23.

0 = Selects RDENn signal.

1 = Selects RSOFOn signal.

Bit 10: Transmit Clock Output Select (TCLKS). This bit is used to select the function of the TGCLKn / TCLKOn

pins. See Table 10-22.

0 = Selects TGCLKn signal.

1 = Selects TCLKOn signal.

Bit 9: Transmit Start Of Frame Output Select (TSOFOS). This bit is used to select the function of the TSOFOn /

TDENn pins. See Table 10-21.

0 = Selects TDENn signal.

1 = Selects TSOFOn signal.

Bits 7 to 6: Port 8 kHz Reference Source Select (P8KRS[1:0]). This bit selects the source of the 8 kHz reference

from the port sources. The 8K reference for this port can be used as the global 8K reference source. See Table

10-13.

PORT.CR3.P8KRS[1:0]

Source

Undefined

Internal receive framer clock

Internal transmit framer clock

Bit 6: Port 8 kHz Reference Source Select (P8KRS). This bit selects the source of the 8 kHz reference from the

port sources. The 8K reference for this port can also be used as the global 8K reference source.

0 = Selects the receive internal framer clock (based on RLCLKn or RX LIU recovered clock

1 = Selects the transmit internal framer clock (based on TCLKIn or the CLAD clock)

Bit 5: PORT 8 kHz Reference Source (P8KREF). This bit selects the source of the 8 kHz reference for PLCP

trailer operation and one second timer.

0 = 8 kHz reference from global source

1 = 8 kHz reference from this ports selected source

DS3172 Datasheet(PDF) 139 Page - Dallas Semiconductor

DS3172 Datasheet(HTML) 139 Page - Dallas Semiconductor

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL