M28529G-12 Mindspeed Technologies, M28529G-12 Datasheet - Page 96

• Manufacturer Part Number: M28529G-12
• Description: ATM IMA 8.192Mbps 1.8V/3.3V 484-Pin BGA
• Manufacturer: Mindspeed Technologies

Specifications of M28529G-12

• Package: 484BGA
• Utopia Type: Level 2
• Typical Operating Supply Voltage: 1.8|3.3 V
• Minimum Operating Supply Voltage: 1.71|3.135 V
• Maximum Operating Supply Voltage: 1.89|3.465 V
• Maximum Output Rate: 8.192 Mbps

Figure 1-21. T1/E1 using Internal Serial ports; IMA_SysClk equals 24x line rate
1.12.5.1.2
Figure 1-22
from the first example:
•
•
•
The device is configured using a software driver. The following code is an example of calls to the driver:
28529-DSH-001-K
In this case, IMA_SysClk is only used by internal logic. It must be greater than or equal to 22 times the line rate
to ensure that internal logic can keep up with the data.
Again, the SPRxClk is used to generate the RxIDCR clock.
The TX IDCR clocks are generated from the IMA_RefClk. Thus IMA_RefClk must equal 1.544, 1.536, 2.028, or
1.920 MHz depending of the frame format used.
24 x line rate
tie to ground
IMA_RefClk
NOT USED;
IMA_SysClk
SPRxClk 0
illustrates T1/E1 with internal serial ports, using IMA_RefClk. There are several important differences
General Notes:
TxClav Transition
1. SPRxCLK 1-31 are identical but not shown for clarity
2. RM - Rate Multiplier.
Using IMA_RefClk as the Transmit Clock
Transition
Detector
Transition
Detector
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Mindspeed Technologies
Pre-Scaler
/16
/24
RM
RM
1
1
RM
1
Synchronizer
ref
Synchronizer
ref
n*8kHz
Synchronizer
NCO
ref
®
RM
1
up/down adjust
n*8kHz
n*8kHz
Note 2
Note 2
NCO
NCO
424
RM
Functional Description
Comparator
Phase
81