MICROCOMPUTER MN101C MN101C49G/49H/49K/F49K/P49K LSI Application Notes Excerption Pub.No.
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About This Manual ■ Configuration of This Manual This LSI application note is consists of the following sections. Chapter 1 Overview This chapter describes the overview of this application note. Chapter 2 Startup Program This chapter describes a startup process necessary for executing a program. Chapter 3 Register Setup of Each Function This chapter describes the setting method and setting examples of registers having MN101C49LSI function.
■ Related Manuals Note that the following related documents are available. "MN101C49G/49H/49K/F49K/P49K LSI User's Manual" "MN101C Series C Compiler User's Manual: Language Description" "MN101C Series C Compiler User's Manual: Library Reference" "MN101C/MN101E Series C Compiler User's Manual: Usage Guide"
Chapter 1 Overview 1 Chapter 2 Startup Program 2 Chapter 3 Register Setup of Each Function 3 Chapter 4 Sample Program 1 4 Chapter 5 Sample Program 2 5 Chapter 6 Appendix 1 6 Chapter 7 Appendix 2 7
Table of Contents Chapter 1 Overview ..................................................................................................................................................... 13 1.1 Overview ........................................................................................................................................................... 14 1.2 Startup Program...................................................................................................................................
3.6 How to Interrupt ................................................................................................................................................ 45 3.6.1 Interrupt vector table.................................................................................................................................. 45 3.6.2 Interrupt processing programs.................................................................................................................... 47 3.6.3 Checking interrupt .
3.14.4 Setting communication speed for UART ............................................................................................... 106 3.14.5 Notes and applications related to communication channel..................................................................... 106 3.15 Data Transfer Function, Initializing Peripherals............................................................................................ 108 3.15.1 Setting in individual modes................................................
5.3 Sample Program Using Serial Function........................................................................................................... 219 5.3.1 Serial program.......................................................................................................................................... 219 5.3.2 Serial program 1....................................................................................................................................... 222 5.3.3 Serial program 2.............
Chapter 3 Register Setup of Each Function 3.9 8-bit Timer, Initializing Peripherals There are five 8-bit timers comprising timer 0 to 4. The timer comprises a binary counter, a compare register and a mode register. You can combine two 8-bit timers, timer 0 and 1 or 2 and 3, to use as a 16-bit timer. Binary counter This counter counts a clock selected by the prescaler or the mode register.
Chapter 3 Register Setup of Each Function BIT3: "0" "1" Stop count Count operation BIT2, 1, 0: Clock source selection 000: High speed crystal clock oscillation frequency 001: Timer 1, prescaler output signal 010: Low speed crystal clock oscillation frequency 011: Synchronous low speed crystal clock oscillation frequency 110: Timer 1, pin input external signal 111: Synchronous timer 1, pin input external signal Timer 2: BIT7: Unused BIT6: Unused BIT5: "0" "1" BIT4: "0" "1" BIT3: "0" "1" Normal operation
Chapter 3 Register Setup of Each Function 001: Timer 3, prescaler output signal 010: Low speed crystal clock oscillation frequency 011: Synchronous low speed crystal clock oscillation frequency 110: Timer 3, pin input external signal 111: Synchronous timer 3, pin input external signal Timer 4: BIT7: Unused BIT6: Unused BIT5: "0" "0" BIT4: "0" "1" BIT3: "0" "1" Normal operation P24(IRQ4), pulse width measurement Normal operation PWM operation Stop count Count operation BIT2, 1, 0: Clock source selection 0
Chapter 3 Register Setup of Each Function 20 MHz / 64 = 312500 312500 / 100 = 3125 This setting is not available with the 8-bit timer. Setting by using low speed oscillation clock: 32.768 kHz/ 4 = 8192 8192 / 100 = 81.92 = approx. 82 If you set the formula 82 − 1 = 81, the interval timer with 10 milli seconds will be set. The following section describes a sample program.
Chapter 3 Register Setup of Each Function #define #define #define #define #define #define #define TM0BC TM0OC_adr 0x3F52 TM0OC TM0MD_adr 0x3F54 TM0MD CK0MD_adr 0x3F56 CK0MD (*(volatile unsigned char *)TM0BC_adr) (*(volatile unsigned char *)TM0OC_adr) (*(volatile unsigned char *)TM0MD_adr) (*(volatile unsigned char *)CK0MD_adr) /* Setting program*/ /* Operation is based on external signal, and prescaler is not set */ TM0OC = COUNT; /* Set timer value */ TM0MD = TM0CAS | TM0EN | TM0CK; This sample is store
Chapter 3 Register Setup of Each Function TMxIO (x is the timer number) Compare register value 8-bit timer overflow cycle （128 Hz） Figure 3 8-bit timer PWM operation timing chart The following section describes a sample program.
Chapter 3 Register Setup of Each Function the interval output for the interval timer. Serial interface transfer clock generation You can use the ouput signal from a timer to generate a serial transfer clock. You can use the interval timer and timer output setting to set the timer. The following timers are available for the serial interface communication.
Chapter 3 Register Setup of Each Function /* Register address declaration */ #define TM2BC_adr 0x3F58 #define TM2BC (*(volatile #define TM2OC_adr 0x3F5A #define TM2OC (*(volatile #define TM2MD_adr 0x3F5C #define TM2MD (*(volatile #define CK2MD_adr 0x3F5E #define CK2MD (*(volatile unsigned char *)TM2BC_adr) unsigned char *)TM2OC_adr) unsigned char *)TM2MD_adr) unsigned char *)CK2MD_adr) /* Setting program */ CK2MD = TM2PSC; /* Set prescaler */ TM2OC = TIME; /* Set timer value */ TM2MD = TM2MOD | TM2PWM | T
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