NEC uPD78056Y - Manual (Page 317)

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CHAPTER 16 SERIAL INTERFACE CHANNEL 0 (
µ
PD78054 Subseries)
Note Busy mode can be cleared by start of serial interface transfer. However, BSYE flag is not cleared
to 0.
Remark CSIE0 : Bit 7 of serial operating mode register 0 (CSIM0)
R ACKD Acknowledge Detection
Clear Conditions (ACKD = 0)
• SCK0 fall immediately after the busy mode is
released during the transfer start instruction execution.
• When CSIE0 = 0
• When RESET input is applied
Set Conditions (ACKD = 1)
• When acknowledge signal (ACK) is detected at the
rising edge of SCK0 clock after completion of
transfer
BSYE Synchronizing Busy Signal Output Control
0
Disables busy signal which is output in synchronization with the falling edge of SCK0 clock just after
execution of the instruction to be cleared to (0) (sets READY status).
R/W Note
1 Outputs busy signal at the falling edge of SCK0 clock following the acknowledge signal.