Data Sheet

Page 57
nRF51822 Product Specification v3.1
8.9 Serial Peripheral Interface (SPI) Master specifications
Table 46 SPI specifications
Figure 13 SPI timing diagram, one byte transmission, SPI mode 0
Table 47 SPI timing parameters
Symbol Description Min. Typ. Max. Units
Test
level
I
SPI125K
Run current for SPI master at 125 kbps. 180 µA 1
I
SPI4M
Run current for SPI master at 4 Mbps. 200 µA 1
f
SPI
Bit rates for SPI. 0.125 4 Mbps N/A
Symbol Description Note Min. Typ. Max. Units
Tes t
level
t
DC
Data to SCK setup. 10 ns 1
t
DH
SCK to Data hold. 10 ns 1
t
CD
SCK to Data valid.
C
LOAD
= 10 pF
97
1
1. Increases/decreases with 1.2 ns/pF load.
ns 1
t
CL
SCK Low time. 40 ns 1
t
CH
SCK High time. 40 ns 1
f
SCK
SCK Frequency. 0.125 4 MHz 1
t
R,
t
F
SCK Rise and Fall time. 100 ns 1
b
7
b
6
b
0
b
7
b
0
t
CD
t
DH
t
DC
t
CL
t
CH
SCK
MISO
MOSI