NEC 78014Y Series, User Manual

Page: 355 / 547

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CHAPTER 16 SERIAL INTERFACE CHANNEL 0 (
µ
PD78014Y Subseries)
355
(continued)
R/W ACKE Acknowledge Signal Automatic Output Control (in the SBI mode)
0 Acknowledge signal automatic output disable (output with ACKT enable)
1 Before completion Acknowledge signal is output in synchronization with the 9th clock
of transfer falling edge of SCK0 (automatically output when ACKE = 1).
After completion Acknowledge signal is output in synchronization with the falling edge of SCK0
of transfer clock immediately after execution of the instruction to be set to 1 (automatically
output when ACKE = 1). However, not automatically cleared to 0 after acknowl
edge signal output.
R ACKD Acknowledge Detection
Clear Conditions (ACKD = 0) Set Conditions (ACKD = 1)
• In the SBI mode, at the falling edge of SCK0 clock • When acknowledge signal (ACK) is detected at the
immediately after the busy mode has been released rising edge of SCK0 clock after completion of transfer
when a transfer start instruction is executed
• When CSIE0 = 0
• When RESET input is applied
R/W
BSYE Note
Synchronizing Busy Signal Output Control
0 When the SBI mode is used, disables busy signal which is output in synchronization with the falling edge of
SCK0 clock immediately after execution of the instruction to be cleared to 0 (with READY state).
1 When the SBI mode is used, outputs busy signal at the falling edge of SCK0 clock following the
acknowledge signal.
Note The busy mode can be cleared by start of serial interface transfer. However, the BSYE flag is not cleared
to 0.
Remark CSIE0: Bit 7 of the serial operating mode register 0 (CSIM0)