www.DataSheet4U.com
CHAPTER 17 SERIAL INTERFACE CHANNEL 1
440
Caution When TRF is cleared, the SO1 pin becomes low.
Remark CSIIF1 : Interrupt request flag
TRF
: Bit 3 of the automatic data transmit/receive control register (ADTC)
When the busy signal becomes inactive, waiting is released. If the sampled busy signal is inactive,
transmission/reception of the next 8-bit data is started at the falling edge of the next clock.
Because the busy signal is asynchronous with the serial clock, it takes up to 1 clock until the busy signal,
even if made inactive by the slave, is sampled. It takes 0.5 clock until data transfer is started after the busy
signal was sampled.
To accurately release waiting, the slave must keep the busy signal inactive at least for the duration of 1.5
clock.
Figure 17-19 shows the timing of the busy signal and releasing the waiting. This figure shows an example
where the busy signal is active as soon as transmission/reception has been started.
Figure 17-19. Busy Signal and Wait Release (when BUSY0 = 0)
Figure 17-18. Operation Timings when Using Busy Control Option (BUSY0 = 0)
SCK1
SO1
SI1
BUSY
CSIIF1
TRF
Busy Input Clear
Busy Input Valid
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
Wait
SCK1
D7
SO1
SI1
D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0
BUSY
(active high)
1.5 clock (min.)
Busy input released
Busy input valid
Wait
If made inactive
immediately after
sampled
Содержание 78014Y Series
Страница 2: ...www DataSheet4U com 2 MEMO...
Страница 8: ...www DataSheet4U com 8 MEMO...
Страница 22: ...www DataSheet4U com 22 MEMO...
Страница 30: ...www DataSheet4U com 30 MEMO...
Страница 34: ...www DataSheet4U com 34 MEMO...
Страница 62: ...www DataSheet4U com CHAPTER 2 OUTLINE PD78014Y Subseries 62 MEMO...
Страница 78: ...www DataSheet4U com CHAPTER 3 PIN FUNCTION PD78014 Subseries 78 MEMO...
Страница 94: ...www DataSheet4U com CHAPTER 4 PIN FUNCTION PD78014Y Subseries 94 MEMO...
Страница 170: ...www DataSheet4U com CHAPTER 7 CLOCK GENERATOR 170 MEMO...
Страница 222: ...www DataSheet4U com CHAPTER 9 8 BIT TIMER EVENT COUNTER 222 MEMO...
Страница 230: ...www DataSheet4U com CHAPTER 10 WATCH TIMER 230 MEMO...
Страница 262: ...www DataSheet4U com CHAPTER 14 A D CONVERTER 262 MEMO...
Страница 318: ...www DataSheet4U com CHAPTER 15 SERIAL INTERFACE CHANNEL 0 PD78014 Subseries 318 MEMO...
Страница 408: ...www DataSheet4U com CHAPTER 16 SERIAL INTERFACE CHANNEL 0 PD78014Y Subseries 408 MEMO...
Страница 446: ...www DataSheet4U com CHAPTER 17 SERIAL INTERFACE CHANNEL 1 446 MEMO...
Страница 472: ...www DataSheet4U com CHAPTER 18 INTERRUPT FUNCTIONS AND TEST FUNCTION 472 MEMO...
Страница 502: ...www DataSheet4U com CHAPTER 22 PD78P014 78P014Y 502 MEMO...
Страница 520: ...www DataSheet4U com CHAPTER 23 INSTRUCTION SET 520 MEMO...