BT8110 View Datasheet(PDF) - Conexant Systems

Part Name

Description

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BT8110

High-Capacity ADPCM Processor

Conexant Systems 

Bt8110/8110B

High-Capacity ADPCM Processor

3.0 Registers

3.2 0x40—Mode Control Register (mode)

Table 3-2. Bt8110B Internal Lookup Table ROM (2 of 2)

CODE[3:0]

Internal ROM Code Table

1100

1101

1110

1111

G.727 (5,5)—Embedded Code

G.727 (x,4)—Embedded Code

G.727 (x,3)—Embedded Code

G.727 (x,2)—Embedded Code

3.2 0x40—Mode Control Register (mode)

A write to address 0x40 will address the mode control registers for all 24 or 32 channels. Five bits are used to

control the mode of operation of the Bt8110/8110B. This register is write-only.

6

RSVD

RSVD

EN_FRMR

EN_32CH

MODE[2:0]

5

RSVD

4

EN_FRMR

3

EN_32CH

2

MODE[2]

1

MODE[1]

0

MODE[0]

Reserved—Unused; should be set to a logic low.

Enable Direct T1/E1 Framer Interface—Set for direct connection to a T1 or E1 framer circuit.

Enable 32-Channel Operation—Set for 32-channel full duplex or 64-channel half-duplex

operation. If it is not set, 24-channel full-duplex or 48-channel half-duplex operation is

obtained.

Mode Control—Set to the values required to obtain the desired operating mode configuration

as follows:

Bit 2

Bit 1

Bit 0

Source

1

0

0

1

0

1

1

1

0

1

1

1

Interleaved

Encoder

Decoder

Not Used

100060C

Conexant

3-3

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