BT8376EPF datasheet(127/323 Pages) CONEXANT

127 / 323 page

Bt8370/8375/8376

3.0 Registers

Fully Integrated T1/E1 Framer and Line Interface

3.2 Global Control and Status Registers

N8370DSE

Conexant

3-9

3.2 Global Control and Status Registers

Unused bits indicated by a dash (—) are reserved and should be written to 0. Writing to reserved bits has no

effect.

000—Device Identification (DID)

Read only value.

DID[7:4]

Device ID—A value of 0x0 indicates Bt8370.

A value of 0x5 indicates the Bt8375.

A value of 0x6 indicates the Bt8376.

DID[3:0]

Device Revision—A value of 0x8 indicates the current revision. Prior revisions are obsolete.

001—Primary Control Register (CR0)

RESET

Device Reset—Active-high indicates a device reset is in progress. The device reset is initiated

by a power-on reset, a software reset, or a hardware reset (RST* pin is active low). RESET can

be monitored to determine when the reset process is complete.

To initiate a software reset, the processor must first write RESET to 0, then delay at least

6 µs, then write RESET to 1. Once initiated, the reset process continues for 15 µs maximum,

and causes the Bt8370/8375/8376 to initialize certain control registers to their default settings,

as shown in Table 3-1, Address Map. The processor must not write to these registers until

RESET returns low, although other non-default registers can be processor-initialized while

RESET is active.

To avoid non-compliant line rate or pulse shape transmissions during the reset process, the

system can three-state the transmit line driver by holding the XOE pin inactive (low).

After the reset process, the following is true:

System bus outputs RSIGO, RPCMO, and SIGFRZO are three-stated.

Interrupt INTR* output is disabled.

Programmable I/O pins are configured as inputs: RFSYNC, RMSYNC,

TFSYNC, TMSYNC, TNEGI/TDLCLKO, and ONESEC.

CONEXANT production test modes are disabled.

DID[7]

DID[6]

DID[5]

DID[4]

DID[3]

DID[2]

DID[1]

DID[0]

RESET

——

RFRAME[3]

RFRAME[2]

RFRAME[1]

RFRAME[0]

T1/E1N

BT8376EPF Datasheet(PDF) 127 Page - Synaptics Incorporated.

BT8376EPF Datasheet(HTML) 127 Page - Synaptics Incorporated.

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