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CHAPTER 16 SERIAL INTERFACE CHANNEL 0 (
µ
PD78014Y Subseries)
348
(a) Bus release signal (REL)
The bus release signal is generated when the SCK0 line is in high level (a serial clock is not output) and
the SB0 (SB1) line changes from low level to high level.
The bus release signal is output by the master.
Figure 16-14. Bus Release Signal
The bus release signal indicates the master will send the address to the slave. The slave contains hardware
to detect the bus release signal.
Caution The bus release signal is acknowledged when the SCK0 line is in high level, and the SB0
(SB1) line changes from low level to high level. Thus, if the timing at which bus changes
deviates due to effects such as board capacity, it may be determined as the bus release
signal even if data is sent. Therefore perform wiring carefully.
(b) Command Signal (CMD)
The command signal is generated when the SCK0 line is in high level (a serial clock is not output) and the
SB0 (SB1) line changes from high level to low level. The command signal is output by the master.
Figure 16-15. Command Signal
The command signal indicates that master will send the command to the slave (However, the command signal
following the bus release signal indicates that address will be sent).
The slave contains hardware to detect the command signal.
Caution The command signal is acknowledged when the SCK0 line is in high level, and the SB0
(SB1) line changes from high level to low level. Thus, if the timing at which bus changes
deviates due to effects such as board capacity, it may be determined as the command
signal even if data is sent. Therefore perform wiring carefully.
SCK0
SB0 (SB1)
“H”
SCK0
SB0 (SB1)
“H”
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...