Automatic Transmission/Reception Mode Flowchart - NEC 78K0 User Manual

Figure 17-14. Automatic Transmission/Reception Mode Flowchart
Write transmit data
in internal buffer RAM
Set ADTP0 to the value (pointer
value) obtained by subtracting 1
from the number of transmit
data bytes
Set the automatic
transmission/reception mode
Set ATSTA0 to 1
Write transmit data from
internal buffer RAM to SIOA0
Transmission/reception
operation
Write receive data from
SIOA0 to internal buffer RAM
ADTP0 = ADTC0
TSF0 = 0
ADTP0:
ADTI0:
ATSTA0:
SIOA0:
ADTC0:
TSF0:
400
CHAPTER 17 SERIAL INTERFACE CSIA0
Start
No
Yes
No
Yes
End
Automatic data transfer address point specification register 0
Automatic data transfer interval specification register 0
Bit 0 of serial trigger register 0 (CSIT0)
Serial I/O shift register 0
Automatic data transfer address count register 0
Bit 0 of serial status register 0 (CSIS0)
User's Manual U15947EJ2V0UD
Increment pointer value
*
Software execution
Hardware execution
Software execution