cx28224 Mindspeed Technologies, cx28224 Datasheet - Page 72

• Manufacturer Part Number: cx28224
• Description: Cx28224/5/9 Inverse Multiplexing For The Atm Ima Family
• Manufacturer: Mindspeed Technologies

IMA Clocks
3.1.1.2
3-6
Using IMA_RefClk as the Transmit Clock
Figure 3-3
several important differences from the first example:
The device is configured using a software driver. The following code is an example of
calls to the driver:
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, 2.048, or 1.920 MHz depending of the frame format
used.
IMA_LINK_TYPE = IMA_DS1
IMA_DSL_USE_REF_CLK2 = IMA_INACTIVE
IMA_DSL_REF_GENERATOR = IMA_INACTIVE
IMA_ALT_RX_TRL = IMA_INACTIVE
IMA_GRP_TX_TRL_SRC = IMA_REF_CLK1 (grp#)
IMA_GRP_RX_TRL_SRC = IMA_RX_TRL_(x) (grp#)
illustrates T1/E1 with internal serial ports, using IMA_RefClk. There are
Mindspeed Technologies
™
CX28224/5/9 Data Sheet
28229-DSH-001-D