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6.3.6 System clock
The internal high-speed oscillation clock, the external high-speed oscillation clock or the external low-
speed oscillation clock can be used as a source clock of the system clock.
Source clock
Frequency
using PLL
Internal high-speed oscillation (IHOSC)
9MHz
(Target)
Can not use PLL
External high-speed oscillation (EHOSC)
8 to 10MHz
Not use or 4 multiplying
External low-speed oscillation (fs)
30 to 34 kHz
-
When the internal high-speed oscillation or the external high-speed oscillation is used as a source clock,
the clock divided by CGSYSCR<GEAR[2:0]> is used as the system clock. Although the setting can be
changed while operating, the actual switching takes place after a slight delay.
Table 6-2 shows the example of the operation frequency by the setting PLL and the clock gear.
Table 6-2 The range of an operation frequency when a clock gear and PLL are used
(Unit : MHz, "-" : Reserved, "*" : Don’t care)
Input frequency
PLL
multiplying
Min.
operation
frequency
(fc)
Max.
operation
frequency
(fc)
ADC Max.
operation
frequency
Clock gear (CG)
PLL = ON
Clock gear (CG)
PLL = OFF
1/1
1/2
1/4
1/8
1/16
1/1
1/2
1/4
1/8
1/16
EHOSC
8
4
1
32
32
32
16
8
4
2
8
4
2
1
-
10
40
40
40
20
10
5
2.5
10
5
2.5
1.25
-
IHOSC
10
10
10
-
-
-
-
-
10
5
2.5
1.25
-
fs
0.032768
-
0.032768
0.032768
-
*
*
*
*
*
*
*
*
*
*
↑ Initial value after reset
Note:
Do not use 1/16 when SysTick is used.
TMPM3V6/M3V4
Page 59
2019-02-06
Summary of Contents for TMPM3V4
Page 1: ...32 Bit RISC Microcontroller TX03 Series TMPM3V6 M3V4 ...
Page 2: ... 2019 Toshiba Electronic Devices Storage Corporation ...
Page 7: ...Revision History Date Revision Comment 2019 02 06 1 First Release ...
Page 8: ......
Page 22: ...xiv ...
Page 52: ...TMPM3V6 M3V4 3 Processor Core 3 6 Exclusive access Page 30 2019 02 06 ...
Page 148: ...TMPM3V6 M3V4 7 Exceptions 7 6 Exception Interrupt Related Registers Page 126 2019 02 06 ...
Page 178: ...TMPM3V6 M3V4 9 Input Output port 9 2 Block Diagrams of Ports Page 156 2019 02 06 ...
Page 354: ...TMPM3V6 M3V4 14 Synchronous Serial Port SSP 14 6 Frame Format Page 332 2019 02 06 ...
Page 419: ...TMPM3V6 M3V4 Page 397 2019 02 06 ...
Page 462: ...TMPM3V6 M3V4 21 Watchdog Timer WDT 21 5 Control register Page 440 2019 02 06 ...
Page 544: ......