BC68F0031 Datasheet, PDF (90/148 Pages) Holtek Semiconductor Inc – I/O RF Transparent Transmission Flash MCU

BC68F0031
I/O RF Transparent Transmission Flash MCU
SCS
SCK (CKPOLB=1)
SCK (CKPOLB=0)
SDO
D7/D0 D6/D1 D5/D2 D4/D3 D3/D4 D2/D5 D1/D6 D0/D7
SDI Data Capture
Write to SPID
(SDO changes as soon as writing occurs; SDO is floating if SCS=1)
Note: For SPI slave mode, if SPIEN=1 and CSEN=0, SPI is always
enabled and ignores the SCS level.
SPI Slave Mode Timing – CKEG = 1
SPI Transfer
A
Master
Master or Slave
?
Slave
SPIM[2:0]=000, 001,
010, 011 or 100
SPIM[2:0]=101
Configure CKPOLB,
CKEG, CSEN and MLS
SPIEN=1
A
Clear WCOL
Write Data
into SPID
Y
WCOL=1?
N
N
Transmission
completed?
(TRF=1?)
Y
Read Data
from SPID
Clear TRF
SPI Transfer Control Flowchart
Transfer
N
finished?
Y
END
Rev. 1.01
90
April 11, 2017