NEC 78K0 User Manual page 402

Figure 17-15. Internal Buffer RAM Operation in 6-Byte Transmission/Reception
FA1FH
FA05H
FA00H
FA1FH
FA05H
FA00H
402
CHAPTER 17 SERIAL INTERFACE CSIA0
(in Automatic Transmission/Reception Mode) (2/2)
(b) 4th byte transmission/reception
Transmit data 6 (T6)
Transmit data 5 (T5)
Transmit data 4 (T4)
Receive data 3 (R3)
Receive data 2 (R2)
Receive data 1 (R1)
(c) Completion of transmission/reception
Receive data 6 (R6)
Receive data 5 (R5)
Receive data 4 (R4)
Receive data 3 (R3)
Receive data 2 (R2)
Receive data 1 (R1)
User's Manual U15947EJ2V0UD
Receive data 4 (R4)
5
+1
3
0
*
5
5
1
SIOA0
ADTP0
ADTC0
ACSIIF
SIOA0
ADTP0
ADTC0
ACSIIF