Cmsemicon CMS32L051 - Page 349

V1.2.2
CMS32L051 User Manual |Chapter 12 Universal Serial Communication Unit
www.mcu.com.cn 349 / 703
Figure 12-42 Restart steps of the master transmit and receive
restart configuration starts.
slave device ready?
port operation
modify SPSm register
configuration
modify SDRmn register
configuration
(mandatory)
(mandatory)
(selection)
(selection)
(selection)
Yes
No
wait till commuication target (slave device)
stops or communication ends
via Configure port register and port mode
register，data output and clock output of
target channel set to invalid.
re-configure when modifying the operational
clock configuration.
re-configure when modifying the transmit
baud rate configuration.
re-configure when modifying serail mode
register mn configuration.
re-configure when modifying serial
communcation operation configuration
register mn.
modify SMRmn register
configuration
modify SCRmn register
configuration
modify SOEm register
configuration
modify SOm register
configuration
modify SOEm register
configuration
(selection)
(selection)
(selection)
(selection)
configure port
write into SSm register
via Configure port register and port mode
register, set data output of target channel to
valid.
set SSmn bit of target channel to 1
(Semn=1: set as operation enable state).
(mandatory)
(mandatory)
restart configuration
completes.
set SOEmn bit to 0, stop output of target
channel
configure serial clock (CKOmn) and serial
data(SOmn) initial output voltage
set SOEmn bit to 1, allow target channel data
output
clear error flag(selection)
when OVF flag remains at set state, erase via
serail flag clear trigger register mn(SIRmn).