Chapter 8
8-bit Timer
8-bit Timer Cascade Connection
VIII - 33
8.8.2
Setup Example
Timer Operation Setup Example of 16-bit Cascade Connection
Here is an example of the timer function that the 16-bit timer, Timer 0 connected with Timer 1 in cascade connec-
tion, generates a periodic interrupt.
An interrupt occurs every 2500 cycles (1 ms) by selecting SYSCLK/2 (at f
SYSCLK
= 5 MHz) as a clock source.
The setup procedure and the description of each step are shown below.
Step
Setting
Register
Description
1
Disable the timer counter
(Upper 8 bits timer)
(Lower 8 bits timer)
TM0MD.TM0EN = 0
TM1MD.TM1EN = 0
Disable the timer count operation.
2
Disable the interrupt
(Upper 8 bits timer)
(Lower 8 bits timer)
TM0ICR.TM0IE = 0
TM1ICR.TM1IE = 0
Disable the timer interrupt.
2
Set the timer mode register
(Lower 8 bits timer)
TM0MD.TM0PWM = 0
TM0MD.TM0MOD = 0
Select the timer normal operation.
3
Set the cascade connection
TM1MD.TM1CAS = 1
Select the cascade connection.
3
Set the clock source
(Lower 8 bits timer)
TM0MD.TM0CK1-0 = 01
Select the prescaler as the clock source.
4
Set the prescaler
(Lower 8 bits timer)
CK0MD.TM0PSC1-0 = X0
CK0MD.TM0BAS = 1
Select SYSCLK/2.
6
Set the interrupt cycle
TM0OC = 0xC3
TM1OC = 0x09
Set the interrupt generation cycle.
Setup value: 2500 -1 (0x09C3)
6
Set the interrupt level
(Upper 8 bits timer)
TM1ICR.TM1LV1-0
Refer to [3.1.3 Maskable Interrupt Control Register Setup].
8
Enable the interrupt
(Upper 8 bits timer)
TM1ICR.TM1IE = 1
9
Enable the timer counter
(Lower 8 bits timer)
TM0MD.TM0EN = 1
Enable the timer count operation.
Summary of Contents for MN101L Series
Page 1: ...Cover MICROCOMPUTER MN101L MN101LR05D 04D 03D 02D LSI User s Manual Pub No 21705 015E ...
Page 2: ......
Page 8: ......
Page 10: ......
Page 11: ...Contents Contents 0 ...
Page 22: ... Contents 11 ...
Page 23: ...I Chapter 1 Overview 1 ...
Page 62: ...Chapter 1 Overview I 40 Cautions for Circuit Setup ...
Page 63: ...II Chapter 2 CPU 2 ...
Page 94: ...Chapter 2 CPU II 32 Reset ...
Page 95: ...III Chapter 3 Interrupts 3 ...
Page 143: ...IV Chapter 4 Clock Mode Voltage Control 4 ...
Page 175: ...V Chapter 5 Watchdog Timer WDT 5 ...
Page 180: ...Chapter 5 Watchdog Timer WDT V 6 Operation ...
Page 181: ...VI Chapter 6 Power Supply Voltage Detection 6 ...
Page 189: ...VII Chapter 7 I O Port 7 ...
Page 248: ...Chapter 7 I O Port VII 60 Port 8 ...
Page 249: ...VIII Chapter 8 8 bit Timer 8 ...
Page 282: ...Chapter 8 8 bit Timer VIII 34 8 bit Timer Cascade Connection ...
Page 283: ...IX Chapter 9 16 bit Timer 9 ...
Page 346: ...Chapter 9 16 bit Timer IX 64 IGBT Output with Dead Time ...
Page 347: ...X Chapter 10 General Purpose Time Base Free Running Timer 10 ...
Page 361: ...XI Chapter 11 RTC Time Base Timer RTC TBT 11 ...
Page 371: ...XII Chapter 12 Real Time Clock RTC 12 ...
Page 389: ...XIII Chapter 13 Serial Interface 13 ...
Page 458: ...Chapter 13 Serial Interface XIII 70 IIC Communication ...
Page 459: ...XIV Chapter 14 DMA Controller 14 ...
Page 472: ...Chapter 14 DMA Controller XIV 14 DMA Data Transfer ...
Page 473: ...XV Chapter 15 Buzzer 15 ...
Page 479: ...XVI Chapter 16 A D Converter ADC 16 ...
Page 493: ...XVII Chapter 17 LCD 17 ...
Page 530: ...Chapter 17 LCD XVII 38 LCD Display Examples ...
Page 531: ...XVIII Chapter 18 ReRAM 18 ...
Page 538: ...Chapter 18 ReRAM XVIII 8 Command Library ...
Page 539: ...XIX Chapter 19 On Board Debugger 19 ...
Page 542: ...Chapter 19 On Board Debugger XIX 4 List of on board debugging functions ...
Page 543: ...XX Chapter 20 Appendix 20 ...