Datasheet

Revision 1.5 Page 22 of 41
nRF905 Product Specification
Figure 6. SPI read operation.
Figure 7. SPI write operation.
Figure 8. SPI NOP timing diagram.
Table 14. SPI timing parameters (C
load
= 10pF)
PARAMETER SYMBOL MIN MAX UNITS
Data to SCK Setup Tdc 5 ns
SCK to Data Hold Tdh 5 ns
CSN to Data Valid Tcsd 45 ns
SCK to Data Valid Tcd 45 ns
SCK Low Time Tcl 40 ns
SCK High Time Tch 40 ns
SCK Frequency Tsck DC 10 MHz
SCK Rise and Fall Tr,Tf 100 ns
CSN to SCK Setup Tcc 5 ns
SCK to CSN Hold Tcch 5 ns
CSN Inactive time Tcwh 500 ns
CSN to Output High Z Tcdz 45 ns
C7 C6 C5 C4 C3 C2 C1 C0
S7 S6 S5 S4 S3 S2 S1 S0 D7 D6 D5 D4 D3 D2 D1 D0
D15
D14 D13 D1 2
D1 1 D10
D9 D8
CSN
SCK
MOSI
MISO
C7 C6 C5 C4 C3 C2 C1 C0 D7 D6 D5 D4 D3 D2 D1 D0 D15 D14 D13 D12 D1 1 D10 D9 D8
S7 S6 S5 S4 S3 S2 S1 S0
CSN
SCK
MO S I
MISO
C7 C6 C0
S7 S0
TcdzTcdTcsd
Tdh
Tdc
TcchTclTclTchTcc Tch
TcwhTcwh
CSN
SCK
MOSI
MISO