INFICON Spot CDS550D - Manual (Page 6)

Research & Development
SPOT CDS500D & CDS550D OEM Sensor SPI-Interface Specification_V1.1 Page 6 of 14
Christian Berg, T based on Felix Mullis, TL Created 11/10/2014 2:36:00 PM
2.5.3 SPI Interface
2.5.3.1 SPI Parameters:
Parameter Description Setting
CPOL Clock Polarity 0, Clock Idle low
CPHA Clock Phase 1, Transmit data on leading edge, read data on falling edge
Mode SPI Mode 1 (CPOL = 0, CPHA = 1)
DORD Bit sequence order 0, MSB first
2.5.3.2 SPI Write
2.5.3.3 SPI Read
2.5.3.4 SPI Timing
Name Symbol Value Unit
Clock frequency fSPI-bus 17 MHz
Clock pulse high-state tpwh 30 ns
Clock pulse low-state tpwl 30 ns
SS/ (SSN) to valid latch tsussn 8 ns
SS/ (SSN) minimal pulse length between write cycles tpwssn 30 ns
Data setup time tsud 6 ns
Data hold time thd 4 ns
Data valid after clock tvd 26 ns