RS8973 Mindspeed Technologies, RS8973 Datasheet - Page 76

• Manufacturer Part Number: RS8973
• Description: Single-chip Sdsl/hdsl Transceiver
• Manufacturer: Mindspeed Technologies

3.0 Registers
3.3 Register Description
A 6-bit read/write register representing an unsigned binary address defined over a range of 0 to 63 decimal.
When written, this register causes the selected 14-bit coefficient of the NEC to be subsequently loaded into the
lowest-order bits of the Access Data Register [access_data_byte[3:0]; 0x7C–0x7F] within 2 symbol periods.
Does not affect the value of the coefficient. No other data access should occur between the time the Read Tap
Select Register is written and the time the Access Data Register is read, or the data may be corrupted.
A 6-bit read/write register representing an unsigned binary address defined over a range of 0 to 63 decimal.
When written, this register causes the lowest-order 14 bits of the Access Data Register [access_data_byte[3:0];
0x7C–0x7F] to be subsequently written to the selected NEC coefficient within 2 symbol periods. Does not
affect the value of the access data register.
A 7-bit read/write register representing an unsigned binary address defined over a range of 0 to 115 decimal.
When written, this register causes the selected 16-bit coefficient of the DFE to be subsequently loaded into the
lowest-order bits of the Access Data Register [access_data_byte[3:0]; 0x7C–0x7F] within 2 symbol periods.
Does not affect the value of the coefficient. No other data access should occur between the time the Read Tap
Select Register is written and the time the Access Data Register is read, or the data may be corrupted.
A 7-bit read/write register representing an unsigned binary address defined over a range of 0 to 115 decimal.
When written, this register causes the lowest-order 16 bits of the Access Data Register [access_data_byte[3:0];
0x7C–0x7F] to be subsequently written to the selected DFE coefficient within 2 symbol periods. Does not
affect the value of the access data register.
3-30
0x72—NEC Read Tap Select Register (nonlinear_ec_tap_select_read)
0x73—NEC Write Tap Select Register (nonlinear_ec_tap_select_write)
0x74—DFE Read Tap Select Register (dfe_tap_select_read)
0x75—DFE Write Tap Select Register (dfe_tap_select_write)
—
—
—
—
7
7
7
7
D[6]
D[6]
—
—
6
6
6
6
D[5]
D[5]
D[5]
D[5]
5
5
5
5
Preliminary Information
D[4]
D[4]
D[4]
D[4]
4
4
4
4
Conexant
D[3]
D[3]
D[3]
D[3]
3
3
3
3
D[2]
D[2]
D[2]
D[2]
Single-Chip SDSL/HDSL Transceiver
2
2
2
2
D[1]
D[1]
D[1]
D[1]
1
1
1
1
N8973DSD
RS8973
D[0]
D[0]
D[0]
D[0]
0
0
0
0