Atmel SpaceWire Router SpW-10X User Manual

Ref.:   UoD_SpW-10X_ 

 

Issue:  3.4 

  

 

Date:  11

 

 

124

 

0 Reserved  0 

Reserved 

bit 

R 

8:1 SpaceWire 

Time-Code 
Enable 

0 

Time-code distribution enable bits for SpaceWire 
ports 8 to 1 respectively.  The appropriate bit 
should be set to 1 to enable time-code distribution 
through the corresponding port. 

R/W 

9 External 

Time-

Code Interface 
Enable 

1 

Time-code distribution enable for External time-
code port 

R/W 

11:10  Not Used 

All bits 
set to 
zero 

- R 

12 Time-code 

Flag 

Mode 

0 

Time-code flag interpretation mode 

When ‘0’ - Time-code control bit flags are 
distributed with valid time-code values regardless 
of the value of the time-code control flags 

When ‘1’ - When the time-code control flags are 
“00” then valid time-codes are distributed. When 
the time-code control flags are not “00” then the 
time-code is discarded and the internal time-code 
register is not updated. 

R/W 

31:13  Not used 

All bits 
set to 
zero 

 R 

 

9.5.9  Transmit Clock Control Register 

The transmit clock control register address is 264 (0x0000 0108). 

The transmit clock control register is shown in Figure 9-10. Bits 1 to 0 are used to determine the 
output divide ratio (TXDIV) for the transmit clock internal PLL.  Bits 15 to 8 are used to stop the 
transmitter clocks of SpaceWire interfaces that are not being used to save power i.e. only clock of the 
SpaceWire ports that are going to be used should be enabled. Bits 20 to 16 are used to set the default 
10Mbits/s transmit data rate (TX10MbitDIV). 

Note:  The transmit clock should not be disabled when an output port is sending data or when the 
interface is in the run state.  The port control/status registers can be used to determine if an output 
port is currently connected to an input port and therefore transferring data.