Specifications

4 Message Reference
88
4.3.11 MVD_MSG_CNFCLOCK - Configure Clock Request
Synopsis
Message sent to an SS7HD board to configure or reconfigure the clocking mode for the
board. It is not necessary to send this message for single board systems or systems
where the CT Bus is not used. In these cases, the options in the MGT_MSG_CONFIG0
message are sufficient.
Format
MESSAGE HEADER
Field Name
Meaning
type
MVD_MSG_CNFCLOCK (0x7e20)
id
0
src
Sending Module ID
dst
MVD_TASK_ID
rsp_req
used to request a confirmation
hclass
0
status
0
err_info
0
len
12
PARAMETER AREA
Offset
Size
Name
0
2
bus_speed
2
2
clk_mode
4
2
pll_clk_src
6
2
ref1_mode
8
2
ref2_mode
10
2
clk_term
Description
This message is used to control the on-board clock circuitry. It allows the user to select
the CT Bus clocking mode and the reference clock sources for the local and bus
reference clocks.
The confirmation message (if requested) indicates success with a status value of 0.
Parameters
The MVD_MSG_CNFCLOCK message includes the following parameters:
bus_speed
Set the CT Bus speed. The following table shows the permitted values and their
meanings.