SpW-10X

Ref.:

UoD_SpW-10X_

 

 

 

 

 

SpaceWire Router

 

UserManual

 

 

 

 

 

Issue:

3.4

 

 

 

 

 

 

User Manual

 

 

 

 

 

 

Date:

11th July 2008

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

should be pulled down (e.g. 4k7 Ω).

 

 

 

 

 

 

 

 

 

 

166

EXT_TIME_IN(7)

In

EXT_TIME_IN(7:0) provides the value of the time-

CMOS3V3

 

165

EXT_TIME_IN(6)

 

code to be distributed by the router when an

 

 

 

164

EXT_TIME_IN(5)

 

external time-code source is selected i.e. when

 

 

163

EXT_TIME_IN(4)

 

SEL_EXT_TIME is high on the rising edge of

 

 

 

162

EXT_TIME_IN(3)

 

 

 

 

 

EXT_TICK_IN.

 

 

 

 

161

EXT_TIME_IN(2)

 

 

 

 

 

 

When SEL_EXT_TIME is high on the rising edge of

 

 

160

EXT_TIME_IN(1)

 

 

 

 

EXT_TICK_IN the value of the time-code counter is

 

 

159

EXT_TIME_IN(0)

 

 

 

 

used for bits 5:0 of the time-code and bits 7:6 of the

 

 

 

 

 

 

 

 

 

 

 

 

EXT_TIME_IN(7:0) are used for the two control

 

 

 

 

 

 

signals, bits 7:6 of the time-code.

 

 

 

 

 

 

 

 

If the time-code port is not being used these inputs

 

 

 

 

 

 

should be pulled down (e.g. 4k7 Ω).

 

 

 

 

 

 

 

 

 

 

167

SEL_EXT_TIME

In

If SEL_EXT_TIME is high on the rising edge of

CMOS3V3

 

 

 

 

 

EXT_TICK_IN the value on EXT_TIME_IN(7:0) is

 

 

 

 

 

 

loaded into the internal time-code register and

 

 

 

 

 

 

 

propagated by the router.

 

 

 

 

 

 

 

 

If SEL_EXT_TIME is low on the rising edge of

 

 

 

 

 

 

 

EXT_TICK_IN the value to be sent in the time-code

 

 

 

 

 

 

will be taken from the internal time-code counter in

 

 

 

 

 

 

the router. The two control-bits (bits 7:6) of the

 

 

 

 

 

 

time-code will come from bits 7:6 of the

 

 

 

 

 

 

 

EXT_TIME_IN(7:0) input.

 

 

 

 

 

 

 

 

If the time-code port is not being used this input

 

 

 

 

 

 

should be pulled down (e.g. 4k7 Ω).

 

 

 

 

 

 

 

 

 

 

168

TIME_CTR_RST

In

This signal causes the internal time-code counter to

CMOS3V3

 

 

 

 

 

be reset to zero.

 

 

 

 

 

 

 

 

The timing parameters used for EXT_TICK_IN also

 

 

 

 

 

 

apply to the time-code counter reset signal

 

 

 

 

 

 

 

(TIME_CTR_RST).

 

 

 

 

 

 

 

 

If the time-code port is not being used this input

 

 

 

 

 

 

should be pulled down (e.g. 4k7 Ω).

 

 

 

 

 

 

 

 

 

 

169

EXT_TICK_OUT

Out

The falling edge of EXT_TICK_OUT is used to

CMOS3V3

 

 

 

 

 

indicated the reception of a time-code. The value of

 

 

 

 

 

 

this time-code is place on the EXT_TIME_OUT(7:0)

 

 

 

 

 

 

outputs and is valid on the rising edge of

 

 

 

 

 

 

 

EXT_TICK_OUT.

 

 

 

 

 

 

 

 

 

 

 

179

EXT_TIME_OUT(7)

Out

Received time-code value which is valid when

 

CMOS3V3

 

178

EXT_TIME_OUT(6)

 

EXT_TICK_OUT is asserted.

 

 

 

 

177

EXT_TIME_OUT(5)

 

 

 

 

 

 

176

EXT_TIME_OUT(4)

 

The value of a received time-code is output on the

 

 

173

EXT_TIME_OUT(3)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Preliminary

 

 

40

 

Page 40
Image 40
Atmel SpW-10X user manual Exttickin the value on EXTTIMEIN70 is, EXTTIMEIN70 input, Exttickout is asserted