13.8 Control in SIO mode
13.8.1 Serial Clock
13.8.1.1 Clock source
Internal or external clocks can be selected by programming SBICR1<SCK[2:0]>.
(1)
Internal clocks
In the internal clock mode, one of the seven frequencies can be selected as a serial clock, which
is output to the outside through the SCKx pin.
At the beginning of a transfer, the SCKx pin output becomes the "High" level.
If the program cannot keep up with this serial clock rate in writing the transmit data or reading
the received data, the SBI automatically enters a wait period. During this period, the serial clock is stop-
ped automatically and the next shift operation is suspended until the processing is completed.
a0
b
a
c
:ULWHWKH
WUDQVPLWGDWD
1
2
3
7
1
2
6
7
8
1
2
3
8
$XWRPDWLFZDLW
a1 a2 a5 a6 a7
b0 b1
b5 b6 b7
b4
c0 c1 c2
SCK pin output
SO pin output
Figure 13-15 Automatic Wait
(2)
External clock (<SCK[2:0]> = "111")
The SBI uses an external clock supplied from the outside to the SCKx pin as a serial clock.
For proper shift operations, the serial clock at the "High" and "Low" levels must have the pulse
widths as shown below.
f
SCKL
f
SCKH
f
SCKL
, f
SCKH
> 4/fsys
SCK pin
Figure 13-16 Maximum Transfer Frequency of External Clock Input
TMPM3V6/M3V4
13. Serial Bus Interface (I2C/SIO)
13.8 Control in SIO mode
Page 302
2019-02-06
Содержание TMPM3V4
Страница 1: ...32 Bit RISC Microcontroller TX03 Series TMPM3V6 M3V4 ...
Страница 2: ... 2019 Toshiba Electronic Devices Storage Corporation ...
Страница 7: ...Revision History Date Revision Comment 2019 02 06 1 First Release ...
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Страница 52: ...TMPM3V6 M3V4 3 Processor Core 3 6 Exclusive access Page 30 2019 02 06 ...
Страница 148: ...TMPM3V6 M3V4 7 Exceptions 7 6 Exception Interrupt Related Registers Page 126 2019 02 06 ...
Страница 178: ...TMPM3V6 M3V4 9 Input Output port 9 2 Block Diagrams of Ports Page 156 2019 02 06 ...
Страница 206: ...TMPM3V6 M3V4 10 16 bit Timer Event Counters TMRB 10 7 Applications using the Capture Function Page 184 2019 02 06 ...
Страница 232: ...TMPM3V6 M3V4 11 Universal Asynchronous Receiver Transmitter Circuit UART 11 4 Operation Description Page 210 2019 02 06 ...
Страница 354: ...TMPM3V6 M3V4 14 Synchronous Serial Port SSP 14 6 Frame Format Page 332 2019 02 06 ...
Страница 419: ...TMPM3V6 M3V4 Page 397 2019 02 06 ...
Страница 420: ...TMPM3V6 M3V4 16 Analog Digital Converter ADC 16 6 Timing chart of AD conversion Page 398 2019 02 06 ...
Страница 462: ...TMPM3V6 M3V4 21 Watchdog Timer WDT 21 5 Control register Page 440 2019 02 06 ...
Страница 510: ...TMPM3V6 M3V4 22 Flash Memory Operation 22 4 Programming in the User Boot Mode Page 488 2019 02 06 ...
Страница 538: ...TMPM3V6 M3V4 25 Electrical Characteristics 25 7 Recommended Oscillation Circuit Page 516 2019 02 06 ...
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