Atmel SpaceWire Router SpW-10X User Manual

Ref.:   UoD_SpW-10X_ 

 

Issue:  3.4 

  

 

Date:  11

 

 

118

 

0 Watchdog 

Timer Mode 
/ Blocking 
Allowed 
Mode 

Set by the input signal 
POR_TIMEOUT_EN_N

. 

When ‘0’ – Watchdog Timer Mode 

When ‘1’ – Blocking Allowed Mode 

When set to ‘1’ then the 
watchdog timer mode is 
enabled.  

When set to ‘0’ then the 
blocking allowed mode is 
enabled. 

See section 8.3.5. 

R/W 

3:1 Timeout 

Selection 

Set by the input signal 
POR_SEL_TIMEOUT0_N

. 

When 0, timeout period is 60-80 µs. 

When 1, timeout period is ~1.3 ms. 

Selects the blockage 
timeout period. Values as 
below: 

“000” => 60-80 µs (N = 2) 

“001” => ~1.3 ms (N = 6) 

“010” => ~10 ms (N = 9) 

“011” => ~82 ms (N = 12) 

“100” => ~1.3 s (N = 16) 

“101” => ~1.3 s (N = 16) 

“110” => ~1.3 s (N = 16) 

“111” => ~1.3 s (N = 16) 

The actual value of the 
timeout period is given by: 

   200 x (2^N) x TCLK 

   +/- 200 x TCLK 

where TCLK is the period of 
the 10 MHz clock signal. 

 

R/W 

4 Enable 

disable on 
silence 

Set by the input signal 
POR_DISCONNECT_ON_SILENCE_N

. 

When set the 
corresponding SpaceWire 
port will be disconnected if 
no activity is detected over 
the timeout period.  

The SpaceWire port will 
only be disconnected if  the 
port was initially started 
when a packet arrived at 
the router to be routed out 
of the specific SpaceWire 
port and the start on 
request bit was set. 

If an external device starts 

R/W