BT8376EPF datasheet(246/323 Pages) CONEXANT

246 / 323 page

Bt8370/8375/8376

3.17 System Bus Registers

Fully Integrated T1/E1 Framer and Line Interface

3-128

Conexant

N8370DSE

0DD—RAM Parity Status (PERR)

All Bt8370/8375/8376 system bus data, signaling, and controls are transferred through a set of internal RAMs

with parity error detection capabilities. Any parity error detected during RAM access is reported in PERR. Each

error event is latched active-high and held until the processor read clears PERR. Parity errors are indicative of

system clock glitches (REFCKI, TSBCKI, or RSBCKI), a failing or excessively noisy power supply, or general

circuit failure.

PERR_TPC

TPC (Transmit) RAM Parity Error

PERR_RPC

RPC (Receive) RAM Parity Error

PERR_SBC

SBC (Control) RAM Parity Error

0E0–0FF—System Bus Per-Channel Control (SBCn; n = 0 to 31)

INSERT

Insert RX Signaling on RPCMO—Enables per-channel signaling insertion on RPCMO output,

where ABCD signaling is supplied by RLOCAL signaling (RPCn; addr 180–19F) or buffered

signaling [RSIGn; addr 1A0–IBF]. INSERT is a lower priority than no signaling (SIG_OFF;

addr 0D1). RSB signaling frame locations are specified by RMSYNC signal in conjunction

with the programmed frame offset [OFFSET; addr 0D8].

SIG_LP

Local Signaling Loopback—Instructs the receiver output signaling on RSIGO to be supplied

from TSIGn buffer contents. Signaling in RPCMO (T1-robbed bit or E1-CAS) is not affected.

0 = normal

1 = local signaling loopback

RLOOP

Local Loopback—RPCMO output data supplied from TSLIP buffer contents.

0 = normal

1 = local loopback

RINDO

Activate RINDO Time Slot Indicator—Receive system bus time slots are individually marked

(active-high for 8 bits) by RINDO. SBI_OE (addr 0D0) overrides RINDO.

0 = RINDO signal inactive (low)

1 = RINDO signal active (high)

TINDO

Activate TINDO Time Slot Indicator—Transmit system bus time slots are individually marked

(active-high for 8 bits) by TINDO.

0 = TINDO inactive

1 = TINDO active

—————

PERR_TPC

PERR_RPC

PERR_SBC

—

INSERT

SIG_LP

RLOOP

RINDO

TINDO

TSIG_AB

ASSIGN

SIG_OFF

INSERT

RLOCAL

RPCMO Inserted Signal

None

ABCD from RSIGn output buffer

ABCD from RPCn local buffer

BT8376EPF Datasheet(PDF) 246 Page - Synaptics Incorporated.

BT8376EPF Datasheet(HTML) 246 Page - Synaptics Incorporated.

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