bt8970 Mindspeed Technologies, bt8970 Datasheet - Page 45

• Manufacturer Part Number: bt8970
• Description: Single-chip Hdsl Transceiver
• Manufacturer: Mindspeed Technologies

0x00—Global Modes and Status Register (global_modes)
hw_revision[3:0]
part_id[2:0]
mode
0x01—Serial Monitor Source Select Register (serial_monitor_source)
hclk_freq[1,0]
100101B
hw_revision[3]
hclk_freq[1]
hclk_freq[1]
7
7
0
0
1
1
hw_revision[2]
hclk_freq[0]
Chip Revision Number—Read-only unsigned binary field encoded with the chip revision
number. Smaller values represent earlier versions, while larger values represent later versions.
The zero value represents the original prototype release. Consult factory for current values and
revision.
Part ID—Read-only binary field set to binary 010 identifying the part as Bt8970.
Power Down Mode—Read/write control bit. When set, stops all filter processing and zeros the
transmit output for reduced power consumption. All RAM contents are preserved. The mode
bit is automatically set by RST assertion and upon initial power application. It can be cleared
only by writing a logic zero, at which time filter processing and transmitter operation can
proceed.
HCLK Frequency Select—Read/write binary field selects the frequency of the HCLK output.
hclk_freq[0]
6
6
0
1
0
1
Preliminary Information/Conexant Proprietary and Confidential
hw_revision[1]
4.0 Register
4
smon[5]
Symbol Frequency (F
pin and power-on detection.
Symbol Frequency (F
Symbol Frequency (F
Symbol Frequency (F
5
5
hw_revision[0]
smon[4]
4
4
Conexant
QCLK
QCLK
QCLK
QCLK
) times 16 hclk_freq[1,0] is set to “00” upon assertion of the RST
) times 16
) times 32
) times 64
part_id[2]
smon[3]
3
3
HCLK Frequency
part_id[1]
smon[2]
2
2
part_id[0]
smon[1]
1
1
smon[0]
mode
0
0
4-1