BT8954 CONEXANT [Conexant Systems, Inc], BT8954 Datasheet - Page 56

• Manufacturer Part Number: BT8954
• Description: VOICE PAIR GAIN FRAMER
• Manufacturer: CONEXANT [Conexant Systems, Inc]

4.0 Registers
4.4 Transmitter Registers
4.4 Transmitter Registers
Transmitter registers are summarized in
Table 4-2. Transmitter Register Summary
The Transmit Embedded Operations Channel (EOC) holds 13 EOC bits for transmission in the next frame.
Refer to Table 3-1 on page 3-3 for the EOC bit positions within the frame. The Payload Mux samples TEOC
coincident with the DSL channel’s transmit 6 ms frame interrupt. Unmodified registers repeatedly output their
contents in each frame. The most significant bit, TEOC[12], is transmitted first.
Transmit Indicator (IND) holds 13 IND bits for transmission in the next frame and includes the FEBE bit,
TIND[1]. Refer to Table 3-1 on page 3-3 for the IND bit positions within the frame. The Payload Mux samples
TIND coincident with the DSL channel’s transmit 6 ms frame interrupt. Unmodified registers repeatedly output
their contents in each frame. The most significant bit, TIND[12], is transmitted first.
4-4
0x80, 0x81—Transmit Embedded Operations Channel (TEOC_LO, TEOC_HI)
TEOC_LO (Address 0x80)
0x82, 0x83—Transmit Indicator Bits (TIND_LO, TIND_HI)
TEOC_HI (Address 0x81)
Address
15
—
0x80
0x81
0x82
0x83
0x84
0x85
0x86
0x87
7
NOTE:
TSFIFO_I, TSFIFO_O
14
—
6
Register Label
TFIFO_WL
TEOC_LO
TEOC_HI
TIND_LO
TIND_HI
TCMD_1
TCMD_2
Bt8954 does not automatically output FEBE. Proper transmit of FEBE requires the
MC to copy the CRC_ERR bit from RSTATUS_2 [0xE6] to TIND[1].
13
—
5
Table
48 x 8
Bits
8
5
8
5
8
6
8
4-2.
12
4
Conexant
TEOC[7:0]
Transmit Embedded Operations Channel
Transmit Embedded Operations Channel
Transmit Indicator
Transmit Indicator
Transmit Signaling FIFOs
TFIFO Water Level
Transmit Command Register 1
Transmit Command Register 2
11
3
TEOC[12:8]
Name/Description
10
2
Voice Pair Gain Framer
1
9
N8954DSC
Bt8954
0
8