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11 configure clock request – Dialogic DSI SPCI Network Interface Boards User Manual

Page 74

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6 Message Reference

74

6.3.11 Configure Clock Request

Synopsis:
Message sent to a DSI SPCI Board to configure the clocking mode for the
board.

Message 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 Status

Response (if confirmation requested)

err_info

0

len

8

PARAMETER AREA

Offset Size

Name

0 2 bus_speed

2 2 clk_mode

4 2 pll_clk_src

6 2 ref1_mode

8

2

Reserved. Set to zero

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 by status of zero.

Parameter Description:

bus_speed
This parameter is used to set the CT bus speed; the permissible values are as
follows: