User's Manual

Doc No: WG1400-00-DTS-D05
Copyright © JORJIN TECHNOLOGIES INC. 2015
http://WWW.JORJIN.COM.TW
CONFIDENTIAL
Page 7
3.5. SPI Interface
 Host SPI Interface timing
Fig 3.5.1 Host SPI interface timing
Table 3.5.1 Host SPI interface timing parameter
Parameter
Number
Parameter (1) Parameter Name Min Max Unit
I1 F Clock frequency @ V BAT = 3.3V 20 MHz
I2 t dk Clock period 50 ns
I3 t LP Clock low period 25 ns
I4 t HT Clock high period 25 ns
I5 D Duty cycle 45 55 %
I6 t IS RX data setup time 4 ns
I7 t IH RX data hold time 4 ns
I8 t OD TX data output delay 20
I9 t OH TX data hold time 24 ns
(1) The timing parameter has a maximum load of 20 pF at 3.3 V.