m28529-12 Mindspeed Technologies, m28529-12 Datasheet - Page 214
m28529-12
Manufacturer Part Number
m28529-12
Description
Inverse Multiplexing For Atm Ima Family
Manufacturer
Mindspeed Technologies
Datasheet
1.M28529-12.pdf
(309 pages)
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2.4.22
This register is used in conjunction with 0x817 to configure the operation of the DSL Clock Generator in the IMA
core. Register 0x816 and 0x817 are an indirect register pair in that a particular clock generator element is selected
using register 0x816 and the configuration for that element is programmed using register 0x817.
The overall operation of the clock generators are governed by the following equations:
•
•
•
•
Link Payload Rate = 8 kbps * (Multiplier Factor) * (Rate Multiplier)
A further constraint is:
•
In a typical G.shdsl application, Intermediate Frequency is set to 2.56 MHz, Rate Multiplier = 1, and the Reference
Denominator is set to 320. Other settings are possible as long as the above equations and constraints are met.
28529-DSH-001-K
7–5
4–0
4–0
4–0
Bit
4-2
1-0
Prescaler Factor = Prescaler Numerator / (Prescaler Terminal Count + 1)
Intermediate Frequency = Reference Clock Frequency * Prescaler Factor
Reference Denominator = 257 + Reference Clock Divisor
8 kHz = Intermediate Frequency / (Reference Denominator)
(Maximum Link Payload Rate) / (Rate Multiplier) ≤ Intermediate Frequency ≤ IMA_SysClk/16
Default
0x00
0x0
—
—
—
0
0x816—IMA_DSL_CLOCK_GEN_ADDR (IMA DSL Clock Generator Control)
Control Type
Sub Type
Group Number
Port Number
Name
—
—
Mindspeed Proprietary and Confidential
Mindspeed Technologies
0 = Basic Setup
1 = Pre-scaler and Reference Divisor Setup
2 = Tx IMA Group Factor LSBs
3 = Tx IMA Group Factor MSB
4 = Rx IMA Group Factor LSBs
5 = Rx IMA Group Factor MSB
6 = Rx Timing Synthesizer Factor LSBs
7 = Rx Timing Synthesizer Factor MSB
Reserved. Set to 0.
Reserved. Set to 0.
0 = Pre-scaler Terminal Count
1 = Pre-scalar Numerator
2 = Reference Divisor
3 = Reserved
M28525: 0–0xF: IMA Group 1–16
M28529: 0–0x1F: IMA Group 1–32
M28525: 0–0xF: Port 0–15
M28529: 0–0x1F: Port 0–31
For Control Type = 2, 3, 4, 5
For Control Type = 6, 7
For Control Type = 0
For Control Type = 1
®
Description
Registers
199
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