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CHAPTER 16 SERIAL INTERFACE CHANNEL 0 (
µ
PD78014Y Subseries)
383
(f)
Wait signal (WAIT)
The wait signal is output by a slave device to inform the master device that the slave device is in wait state
due to preparing for transmitting or receiving data.
The slave device notifies the master device about the wait state by keeping the SCL pin low.
When the wait state is released, the master device can start the next transfer. For the releasing operation
of slave devices, see section 16.4.6 Cautions on use of I
2
C bus mode.
Figure 16-43. Wait Signal
(a) Wait of 8 Clock Cycles
(b) Wait of 9 Clock Cycles
D2
D1
D0
ACK
D7
Output by manipulating ACKT
SCL of
master device
6
7
8
9
1
3
2
4
D6
D5
D4
Slave device drives low, though
master device returns to Hi-Z state.
No wait is inserted after 9th clock cycle.
(and before master device starts next transfer.)
SCL of
slave device
SCL
SDA0 (SDA1)
D2
D1
D0
ACK
D7
Output based on the value set in ACKE in advance
SCL of
master device
6
7
8
9
2
3
D6
D5
Slave device drives low, though
master device returns to Hi-Z state.
SCL of slave device
SCL
SDA0 (SDA1)
1
Summary of Contents for 78014Y Series
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Page 62: ...www DataSheet4U com CHAPTER 2 OUTLINE PD78014Y Subseries 62 MEMO...
Page 78: ...www DataSheet4U com CHAPTER 3 PIN FUNCTION PD78014 Subseries 78 MEMO...
Page 94: ...www DataSheet4U com CHAPTER 4 PIN FUNCTION PD78014Y Subseries 94 MEMO...
Page 170: ...www DataSheet4U com CHAPTER 7 CLOCK GENERATOR 170 MEMO...
Page 222: ...www DataSheet4U com CHAPTER 9 8 BIT TIMER EVENT COUNTER 222 MEMO...
Page 230: ...www DataSheet4U com CHAPTER 10 WATCH TIMER 230 MEMO...
Page 262: ...www DataSheet4U com CHAPTER 14 A D CONVERTER 262 MEMO...
Page 318: ...www DataSheet4U com CHAPTER 15 SERIAL INTERFACE CHANNEL 0 PD78014 Subseries 318 MEMO...
Page 408: ...www DataSheet4U com CHAPTER 16 SERIAL INTERFACE CHANNEL 0 PD78014Y Subseries 408 MEMO...
Page 446: ...www DataSheet4U com CHAPTER 17 SERIAL INTERFACE CHANNEL 1 446 MEMO...
Page 472: ...www DataSheet4U com CHAPTER 18 INTERRUPT FUNCTIONS AND TEST FUNCTION 472 MEMO...
Page 502: ...www DataSheet4U com CHAPTER 22 PD78P014 78P014Y 502 MEMO...
Page 520: ...www DataSheet4U com CHAPTER 23 INSTRUCTION SET 520 MEMO...