Basic Transmission Mode Flowchart - NEC PD78052 User Manual

Start
Write transmit data
in buffer RAM
Set ADTP to the value (pointer
value) obtained by subtracting 1
from the number of transmit
data bytes
Set the transmission/reception
operation interval time in ADTI
Write any data to SIO1
(Start trigger)
Write transmit data from
buffer RAM to SIO1
Transmission operation
Pointer value = 0
Yes
TRF = 0
Yes
End
ADTP : Automatic data transmit/receive address pointer
ADTI
SIO1
TRF
422
CHAPTER 18 SERIAL INTERFACE CHANNEL 1
Figure 18-12. Basic Transmission Mode Flowchart
Decrement pointer value
No
No
: Automatic data transmit/receive interval specify register
: Serial I/O shift register 1
: Bit 3 of automatic data transmit/receive control register (ADTC)
Software Execution
Hardware Execution
Software Execution