BT8376EPF datasheet(155/323 Pages) CONEXANT

155 / 323 page

Bt8370/8375/8376

3.0 Registers

Fully Integrated T1/E1 Framer and Line Interface

3.6 Primary Control and Status Registers

N8370DSE

Conexant

3-37

TCKI[1:0]

TCKI Source Select—The internal transmit clock mux selects 1 of four clock signals. The

selected clock signal is applied to the transmit clock monitor and is a timing reference for the

digital transmitter block. This clock signal must operate at the T1/E1 line rate. If TJAT is

disabled [JDIR; addr 002], the selected clock signal also appears on TCKO pin. TCKI input

pin is ignored when a clock source other than TCKI is selected.

TCKO follows TCKI during NRZ mode (framer mode only). NRZ mode is detected when

TNRZ bit in TCR1 register [addr 071] is set and TPOSO/TNEGO/TCKO outputs are selected

and enabled. Otherwise, during normal mode (integrated LIU and framer) TCKO follows

JCLK if JAT is enabled in the Transmit direction. TCKO follows TCKI if the JAT is either in

the receiver or is disabled.

01B—Test Mux Configuration (TMUX)

TMUX[5:0]

Test Mux Configuration—Reserved for CONEXANT production test.

01C—Test Configuration (TEST)

TEST

Global Test Enable—Reserved for CONEXANT production test.

TCKI[1:0]

TCKI Source

Notes

TCKI

Normal transmit (With TSLIP)

RCKO

Internal RCKO (before output

buffer)

RSBCKI

Transmit slaved to RSB

CLADO

Internal CLAD (before output

buffer).

——

TMUX[5]

TMUX[4]

TMUX[3]

TMUX[2]

TMUX[1]

TMUX[0]

——————

TEST[1]

TEST[0]

BT8376EPF Datasheet(PDF) 155 Page - Synaptics Incorporated.

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