Chapter 1: Hardware Description

The two first TDM busses of each serial interface are connected to the four TDM busses of the QuadFALC. The two others TDM busses of each serial interface are used in “pass through mode”. The TDM busses are at a bit rate of 2.048 Mb/s or 8.192 Mb/s.

Bank of Clocks

The PowerQUICC II CPM features a bank of clocks that can be selected independently for each device used. However, the choice for each device is limited. In addition to the ports configuration as clock inputs, it is necessary to configure the clock source of each TDM bus. For all the TDM busses used, the clock is common for receive and transmit directions (configured in the SIxxMR registers).

Table 1-10. CPM Bank of Clocks Usage

&ORFN

&30￿,￿2￿3RUW

8VDJH

 

 

 

&/.￿

3&￿￿￿￿

7'0D￿￿￿7'0G￿￿

 

 

 

&/.￿

3&￿￿￿￿

7'0E￿￿￿7'0F￿

 

 

 

&/.￿

3&￿￿￿￿

￿￿￿￿￿￿￿0+]￿IRU￿%5*￿

 

 

 

&/.￿￿

3&￿￿￿￿

7'0F￿￿￿7'0D￿￿

 

 

 

&/.￿￿

3&￿￿￿￿

)DVW￿(WKHUQHW￿5[￿&ORFN

 

 

 

&/.￿￿

3&￿￿￿￿

7'0G￿￿￿7'0E￿￿

 

 

 

&/.￿￿

3&￿￿￿￿

)DVW￿(WKHUQHW￿7[￿&ORFN

 

 

 

Baud Rate Generator

The Baud Rate Generator receives CLK5 = 25.000 MHz ±20 ppm and provides BRG6 = 12.500 MHz ±20 ppm for the QuadFALC clock input.

Table 1-11. CPM Baud Rate Usage

&ORFN

&30￿,￿2￿3RUW

8VDJH

 

 

 

%5*￿

3&￿￿￿￿

￿￿￿￿￿0+]￿￿￿￿￿￿SSP￿WR￿4XDG)$/&

 

 

 

Ethernet 10/100BaseT

The FCC3 part of the CPM is used to control an Ethernet 10/100baseT port. An on-board LXT971A line interface unit controls the Ethernet interface to a RJ45 connector J3. The CPM interface to the line interface unit is a MII (Media-Independent Interface) bus.

Table 1-12. Ethernet Signals on the CPM

Ethernet Signal

CPM I/O Port

Dir

Description

 

 

 

 

)(B7;'>￿￿￿@

3%￿￿￿￿￿

2

7UDQVPLW￿1LEEOH￿'DWD

 

 

 

 

)(B5;'>￿￿￿@

3%￿￿￿￿￿￿

,

5HFHLYH￿1LEEOH￿'DWD

 

 

 

 

)(B&56

3%￿￿￿￿

,

&DUULHU￿6HQVH

4538 Hardware Reference Manual

11