Kontron KTT30-mITX - Manual (Page 31)

KTD-N0857-A Page 28 Pin Connectors
KTT30/mITX Users Guide
8.12 SPI TM Interface
The KTT30 provides one synchronous full duplex Serial Peripheral Interface Bus (SPI TM ) for customer requi-
rements. All four SPI TM signals are 5V tolerant.
Two things should be considered:
1. An onboard SPI TM flash coexists on the same interface lines. You must disable this component with a
3.3V power connection to the ADDIN signal (e.g. a short circuit jumper between pin 2 and 4).
2. The four SPI TM lines are protected with an additional bus driver and the ISOLATE# signal controls the
output enable pin. For normal operation this signal should be high.
The SPI
TM interface is available on connector J35 (pin header, 10 pins).
Header Pin Signal Description Type
1 SPI_CLK SPI TM clock O-3.3
2 VCC3 1) Power +3.3V PWR
3 SPI_CS# SPI TM slave select O-3.3
4 ADDIN Disable onboard SPI flash I-3.3
5 RSVD Reserved (10k pullup to 3.3V) PWR
6 N.C. Not connected NC
7 SPI_MOSI SPI TM master output O-3.3
8 ISOLATE# Disable the SPI interface I-3.3
9 SPI_MISO SPI TM master input I-3.3
10 GND Ground PWR
CAUTION!
If you permanently disable the onboard SPI TM flash then you disable the
standard boot device which contains the U-Boot bootloader. In this case
please contact your local Distributor or Field Application Engineer (FAE).
Note: 1) To protect the external power lines of peripheral devices make sure that
- the wires have the right diameter to withstand the maximum available current.
- to enclosure of the peripheral device fulfills the fire-protecting conditions of IEC/EN 60950.
1 2
9 10