NEC 78014Y Series User Manual page 387

R/W ACKE
R ACKD
Notes
Remark
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CHAPTER 16 SERIAL INTERFACE CHANNEL 0 ( µ PD78014Y Subseries)
Acknowledge Signal Automatic Output Control
0 Disables acknowledge signal automatic output. (However, output with ACKT enable)
Use for reception when 8-clock wait mode is selected or for transmission
1 Enables acknowledge signal automatic output.
Outputs acknowledge signal in synchronization with the 9th clock falling edge of SCL (automatically output
when ACKE = 1). However, not automatically cleared to 0 after acknowledge signal output.
Used in reception with 9-clock wait mode selected.
Acknowledge Detection
Clear Conditions (ACKD = 0)
• Upon execution of a transfer start instruction in the I
mode
• When CSIE0 = 0
• When RESET input is applied
1. Should be set before starting transfer.
2. Output acknowledge signal in reception with ACKT when 8-clock wait is selected.
CSIE0: Bit 7 of the serial operating mode register 0 (CSIM0)
Note 1 2
(in the I C bus mode)
Note 2
Set Conditions (ACKD = 1)
2 C • When acknowledge signal is detected at the rising
edge of SCL clock after completion of transfer
.
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