12.6 Clock Control
12.6.1 Prescaler
There is a 7-bit prescaler to divide a prescaler input clock φT0 by 1, 2, 4, 8, 16, 32, 64 and 128.
Use the CGSYSCR and SCxEN<BRCKSEL> in the clock/mode control block to select the input clock of
the prescaler.
The prescaler becomes active only when the baud rate generator is selected as a transfer clock by
SCxMOD0<SC[1:0]> = "01".
12.6.2 Serial Clock Generation Circuit
The serial clock generation circuit is a block to generate transmit and receive clocks (SIOCLK) and con-
sists of the circuits in which clocks can be selected by the settings of the baud rates generator and modes.
12.6.2.1 Baud Rate Generator
The baud rate generator generates transmit and receive clocks to determine the serial channel transfer
rate.
(1)
Baud Rate Generator input clock
The input clock of the baud rate generator is selected from the prescaler outputs divided by 1, 4,
16 and 64.
This input clock is selected by setting the SCxEN<BRCKSEL> and SCxBRCR<BRCK>.
SCxEN<BRCKSEL>
SCxBRCR<BRCK>
Baud rate generator
input clock φTx
0
00
φT0/2
0
01
φT0/8
0
10
φT0/32
0
11
φT0/128
1
00
φT0
1
01
φT0/4
1
10
φT0/16
1
11
φT0/64
(2)
Baud Rate Generator output clock
The frequency division ratio of the output clock in the baud rate generator is set by SCxBRCR
and SCxBRADD.
The following frequency divide ratios can be used; 1/N frequency division in the I/O interface
mode, either 1/N or 1/(N + (16-K)/16) in the UART mode.
The table below shows the frequency division ratio which can be selected.
TMPM3V6/M3V4
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2019-02-06
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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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