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14. 8-bit Timer Counter (TC0)
TMP89FM42
RA002
14.4.3 8-bit pulse width modulation (PWM) output mode
The pulse-width modulated pulses with a resolution of 7 bits are output in the 8-bit PWM mode. An addi-
tional pulse can be added to the 2
×
n-th duty pulse. This enables PWM output with a resolution nearly equiva-
lent to 8 bits. (n=1, 2, 3...)
The operation of TC00 is described below, and the same applies to the operation of TC01.
14.4.3.1 Setting
TC00 is put into the 8-bit PWM mode by setting T00MOD<TCM0> to "10" and T001CR<TCAS> to
"0". Set T00MOD<EIN0> to "0" and select the clock at T00MOD<TCK0>. Set the count value to be used
for the match detection and the additional pulse value at the PWM register T00PWM.
Set T00MOD<DBE0> to "1" to use the double buffer.
Setting T001CR<T00RUN> to "1" starts the operation. After the timer is started, writing to T00MOD
becomes invalid. Be sure to complete the required mode settings before starting the timer.
In the 8-bit PWM mode, the T00PWM register is configured as follows:
PWMDUTY is a 7-bit register used to set the duty pulse width value (the time before the first output
change) in a cycle (128 counts of the source clock).
PWMAD is a register used to set the additional pulse. When PWMAD is "1", an additional pulse that
corresponds to 1 count of the source clock is added to the 2
×
n-th duty pulse (n=1, 2, 3...). In other words,
the 2
×
n-th duty pulse has the output of 1.
The additional pulse is not added when PWMAD is "0".
Timer register 00
T00PWM
7
6
5
4
3
2
1
0
(0x0028)
Bit Symbol
PWMDUTY
PWMAD
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
After reset
1
1
1
1
1
1
1
1
Timer register 01
T01PWM
7
6
5
4
3
2
1
0
(0x0029)
Bit Symbol
PWMDUTY
PWMAD
Read/Write
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
After reset
1
1
1
1
1
1
1
1
Содержание TLCS-870/C1 Series
Страница 1: ...8 Bit Microcontroller TLCS 870 C1 Series TMP89FM42 查询TMP89FM42供应商 捷多邦 专业PCB打样工厂 24小时加急出货 ...
Страница 3: ...Revision History Date Revision 2007 10 25 1 First Release 2007 11 3 2 Contents Revised ...
Страница 4: ......
Страница 14: ......
Страница 18: ...1 3 Block Diagram TMP89FM42 1 3 Block Diagram Figure 1 2 Block Diagram ...
Страница 22: ...1 4 Pin Names and Functions TMP89FM42 ...
Страница 60: ...2 CPU Core 2 5 Revision History TMP89FM42 ...
Страница 76: ...3 Interrupt Control Circuit 3 8 Revision History TMP89FM42 ...
Страница 86: ...4 External Interrupt control circuit 4 3 Function TMP89FM42 ...
Страница 102: ...7 Voltage Detection Circuit 7 5 Revision History TMP89FM42 ...
Страница 126: ...8 I O Ports 8 3 I O Port Registers TMP89FM42 Note 2 i 0 to 1 ...
Страница 136: ...8 I O Ports 8 5 Revision History TMP89FM42 ...
Страница 142: ...9 Special Function Registers 9 3 SFR3 0x0E40 to 0x0EFF TMP89FM42 ...
Страница 146: ...10 Low Power Consumption Function for Peripherals TMP89FM42 ...
Страница 149: ...TMP89FM42 11 3 Revision History Rev Description RA001 Deleted SLEEP2 description ...
Страница 150: ...11 Divider Output DVO 11 3 Revision History TMP89FM42 ...
Страница 220: ...15 Real Time Clock RTC 15 4 Real Time Clock Operation TMP89FM42 ...
Страница 250: ...16 Asynchronous Serial Interface UART 16 15 Revision History TMP89FM42 ...
Страница 302: ...18 Serial Bus Interface SBI 18 7 Revision History TMP89FM42 ...
Страница 336: ...21 Flash Memory 21 4 Toggle Bit D6 TMP89FM42 Note 1 Make sure that you set the C register to 0x00 LD FLSCR2 0xD5 ...
Страница 338: ...21 Flash Memory 21 4 Toggle Bit D6 TMP89FM42 ...
Страница 384: ...22 Serial PROM Mode 22 15 Revision History TMP89FM42 ...
Страница 388: ...24 Input Output Circuit 24 1 Control Pins TMP89FM42 ...
Страница 404: ...25 Electrical Characteristics 25 11 Revision History TMP89FM42 ...
Страница 406: ...26 Package Dimensions TMP89FM42 ...
Страница 408: ......