# Rabbit SBC BL4S200

**URL:** <https://forums.digi.com/t/rabbit-sbc-bl4s200/15440>\
**Category:** Other & Legacy Products\
**Tags:** bl4s200\
**Created:** [September 22, 2015, 1:54pm UTC](https://forums.digi.com/t/rabbit-sbc-bl4s200/15440 "2015-09-22T13:54:00Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![copran](https://avatars.discourse-cdn.com/v4/letter/c/e95f7d/32.png) [@copran](https://forums.digi.com/u/copran)\
**Post date:** [September 22, 2015, 1:54pm UTC](https://forums.digi.com/t/rabbit-sbc-bl4s200/15440/1 "2015-09-22T13:54:00Z")

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I want to use SPI in my board BL4S200, the sample showed  
:  
PB7 acts as the CS line on the ADC  
PB0 is the serial B clock line(SCLK)

```
PC4 is the data output(MOSI)
PC5 is the data input(MISO)

```

Not sure where are PB7,PB0, PC4, PC5 ? please help. Thanks

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**Author:** ![petermcs](https://avatars.discourse-cdn.com/v4/letter/p/4af34b/32.png) [@petermcs](https://forums.digi.com/u/petermcs)\
**Post date:** [September 23, 2015, 2:32am UTC](https://forums.digi.com/t/rabbit-sbc-bl4s200/15440/2 "2015-09-23T02:32:58Z")

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Have a look at the circuit diagram here:

[http://ftp1.digi.com/support/documentation/0900267\_g.pdf](http://ftp1.digi.com/support/documentation/0900267_g.pdf)

Regards,  
Peter

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**Author:** ![TomCollins](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.digi.com/tomcollins/32/37_2.png) [@TomCollins](https://forums.digi.com/u/TomCollins)\
**Post date:** [October 6, 2015, 2:22pm UTC](https://forums.digi.com/t/rabbit-sbc-bl4s200/15440/3 "2015-10-06T14:22:52Z")

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Page 25 of [the manual](http://ftp1.digi.com/support/documentation/019-0171_F.pdf) shows the pinouts for the BL4S200.