User guide

Arch Meter Corporation PS1000 Ver1.2
PS1000Rev. 1.2 May 2006
32/ 67
www.archmeter.com
For the SPI interface, it can select the different clock phase and polarity. Here
is the timing diagram to show the different configuration.
CPHA=0
SCK (CPOL = 0)
SCK (CPOL = 1)
SAMPLE in
MOSI/MISO
CHANGE on
MOSI pin
CHANGE on
MISO pin
SEL SS out
master only
SEL SS IN
Begin
End
MSB 6 5
4
3 2 1 LSB
MSB
6
5
4
3 2
1
LSB
SCK (CPOL = 0)
SCK (CPOL = 1)
SAMPLE in
MOSI/MISO
CHANGE on
MOSI pin
CHANGE on
MISO pin
SEL SS out
master only
SEL SS IN
Begin
End
MSB 6
4 3
2
1
LSB
5
MSB 6 5
4 3 2 1
LSB