Interrupt Status Register | Freescale Semiconductor MC68HC08KH12

Table 7-3. Interrupt Sources

		Mask(1)	INT	Priority(2)
Source	Flag	Mask(1)	Register	Priority(2)	Vector Address
			Flag

Port-D Keyboard Pin Interrupt	KEYDF	IMASKD	IF9	9	$FFEA–$FFEB

Port-F Keyboard Pin Interrupt	KEYFF	IMASKF	IF10	10	$FFE8–$FFE9

Phase-locked Loop Interrupt	PLLF	PLLIE	IF11	11	$FFE6–$FFE7

(1)The I bit in the condition code register is a global mask for all interrupts sources except the SWI instruction.

(2)0= highest priority

7.6.2.1 Interrupt Status Register 1

Address:	$FE04
	Bit 7	6	5	4	3	2	1	Bit 0

Read:	IF6	IF5	IF4	IF3	IF2	IF1	0	0

Write:	R	R	R	R	R	R	R	R

Reset: 0

= Reserved

Figure 7-12. Interrupt Status Register 1 (INT1)

IF6–IF1 — Interrupt Flags 1–6

These flags indicate the presence of interrupt requests from the sources shown in Table 7-3.

1 = Interrupt request present

0 = No interrupt request present

Bit 0 and Bit 1 — Always read 0

MC68HC(7)08KH12 — Rev. 1.1	Advance Information

Freescale Semiconductor	77

Page 77

Image 77

Freescale Semiconductor MC68HC08KH12 manual Interrupt Status Register 1 INT1

MC68HC08KH12 specifications

The Freescale Semiconductor MC68HC08KH12 is a versatile microcontroller that has gained popularity in various embedded systems applications. Part of the HC08 family, this microcontroller combines a robust architecture with comprehensive on-chip features, making it suitable for a wide range of applications ranging from industrial control to consumer electronics.

One of the main features of the MC68HC08KH12 is its 8-bit architecture, which provides an optimal balance between performance and power efficiency. It operates at clock speeds of up to 2 MHz, allowing for efficient execution of instructions while maintaining low power consumption. The microcontroller is designed to operate over a voltage range of 2.7 to 5.5 volts, making it adaptable to various system requirements.

The MC68HC08KH12 is equipped with 1 Kbyte of RAM and 12 Kbytes of ROM, which allows for substantial program and data storage. The on-chip memory helps reduce the need for external components, simplifying the design of embedded systems and enhancing reliability. With a wide range of I/O options, including 26 general-purpose I/O pins, the microcontroller provides flexibility in interfacing with sensors, actuators, and other devices.

In terms of technologies, the MC68HC08KH12 features an advanced instruction set that enhances programming efficiency. It supports basic arithmetic operations, bit manipulation, and control transfer instructions, making it suitable for a variety of computational tasks. The integrated timers, analog-to-digital converters, and serial communication interfaces, including UART, provide the necessary tools for real-time control and data exchange with peripheral devices.

Another characteristic of the MC68HC08KH12 is its low power mode capabilities, which allow it to enter a sleep state during periods of inactivity. This feature is essential in battery-powered applications, where minimizing power consumption is crucial for extending operational life.

Overall, the Freescale Semiconductor MC68HC08KH12 stands out as a reliable microcontroller that combines performance, flexibility, and power efficiency. Its extensive features and technologies enable engineers to design robust embedded systems that meet the demands of modern applications. As a result, the MC68HC08KH12 remains a valuable choice for developers seeking a highly functional yet cost-effective microcontroller solution.

Contents

MC68HC08KH12 Data Sheet Page Advance Information MC68HC708KH12 List of SectionsPage Table of Contents Random-Access Memory RAM System Integration Module SIM Clock Generator Module CGM Universal Serial Bus Module USB Monitor ROM MON O Ports Computer Operating Properly COP Keyboard Interrupt Module KBI Break Module Break Mechanical Specifications Page Title List of Figures HDP1CR-HDP4CR Title Title Title List of Tables Title General Description Contents Introduction FeaturesPage 1shows the structure of the MC68HC708KH12 MCU Block Diagram MCU Block Diagram 2Shows the 64-pin QFP assignments Pin Assignments Power Supply Bypassing SIM Module KBI and . Timer Interface Module TIM. Page Memory Map Memory Map I/O Section Control, Status, and Data Registers Toie Control, Status, and Data Registers Pllie Keyff Rxdie $FF8D $FFFF Vector Addresses Monitor ROM1is a list of vector locations Page This section describes the 384 bytes of RAM Random-Access Memory RAMFunctional Description Page Read-Only Memory ROM Page Configuration Register Config = COP module disabled = COP module enabled Configuration Register Config Central Processor Unit CPU CPU Registers CPU Registers Index Register HX Stack Pointer SP Program Counter PC Condition Code Register CCR Page Arithmetic/Logic Unit ALU Page System Integration Module SIM Introduction SIM Block Diagram SIM I/O Register Summary SIM Bus Clock Control and Generation 1shows the internal signal names used in this sectionSignal Name Conventions Reset and System Initialization PIN Bit Set Timing External Reset Timing Power-On Reset COP reset is asynchronous to the bus clock Computer Operating Properly COP Reset POR Recovery Universal Serial Bus Reset Illegal Opcode ResetIllegal Address Reset SIM Counter Exception Control Interrupt Processing Hardware Interrupts Interrupt Entry 11.Interrupt Recognition Example Interrupt Sources SWI Instruction 12. Interrupt Status Register 1 INT1 Interrupt Status Register 14. Interrupt Status Register 2 INT2 13. Interrupt Status Register 2 INT2 Low-Power Modes 15. Wait Mode Entry Timing 16. Wait Recovery from Interrupt or Break 18. Stop Mode Entry Timing SIM Registers SIM Registers 21. Reset Status Register RSR 22. Break Flag Control Register Bfcr Page Clock Generator Module CGM Introduction 1shows the structure of the CGM CGM Block Diagram Page FRDV = fRCLK/R Page 3MHz, or 1.5MHz respectively Choose P = 0, 1, 2, or 3 for a bus frequency of 12MHz, 6MHz CGM Numeric Example Page CGM External Connections I/O Signals Cgmvsel CGM Registers 101 CGM I/O Register Summary 102 PLL Control Register Pctl 103 104 PRE10 Programming 105 PLL Multiplier Select Registers Pmshpmsl RDS30 Reference Divider Select Bits Initializes the register to $01 for a default divide valueReference division factor R. See 8.4.3 PLL Circuits Programming the PLL. RDS70 cannot be written when 107 InterruptsSpecial Modes 108 Acquisition/Lock Time Specifications 109 110 111 112 113 Universal Serial Bus Module USB 114 115 Overview 116 I/O Register Description of the HUB function 117 HUB Control Register Summary 118 Setup 119 HUB Data Register Summary 120 USB HUB Root Port Control Register Hrpcr 121 USB HUB Downstream Port Control Registers 122 123 USB SIE Timing Interrupt Register Sietir 124 125 USB SIE Timing Status Register Sietsr 126 127 USB HUB Address Register Haddr 128 USB HUB Interrupt Register 0 HIR0 129 USB HUB Control Register 0 HCR0 130 131 USB HUB Control Register 1 HCR1 132 10. USB HUB Status Register HSR 133 134 I/O Register Description of the Embedded Device Function 135 Embedded Device Control Register Summary 136 Embedded Device Data Register Summary DE1D0 137 13. USB Embedded Device Interrupt Register 0 DIR0 12. USB Embedded Device Address Register Daddr 139 140 14. USB Embedded Device Interrupt Register 1 DIR1 141 15. USB Embedded Device Control Register 0 DCR0 142 143 16. USB Embedded Device Control Register 1 DCR1 144 17. USB Embedded Device Status Register DSR 145 146 18. USB Embedded Device Control Register 2 DCR2 147 19. USB Embedded Device Endpoint 0 Data Register UE0D0-UE0D7 148 20. USB Embedded Device Endpoint 0 Data Register UE0D0-UE0D7 149 Monitor ROM MON 150 151 Monitor Mode Circuit 152 Mode Selection 153 Mode Differences Sample Monitor Waveforms Monitor Data Format 155 Break Transaction 156 Read Read Memory CommandWrite Write Memory Command 157 Iread Indexed Read CommandIwrite Indexed Write Command 158 Readsp Read Stack Pointer CommandRUN Run User Program Command 159 Monitor Baud Rate Selection 160 161 Timer Interface Module TIM 162 163 TIM Block Diagram 164 TIM I/O Register Summary 165 Buffered Output Compare Unbuffered Output CompareRegisters of the linked pair alternately control the output 166 167 168 Unbuffered PWM Signal Generation 169 Buffered PWM Signal Generation 170 PWM InitializationTIM status control register TSC, clear the TIM stop bit 171 Wait Mode 172 11.8 I/O SignalsTIM During Break Interrupts Minimum Tclk pulse width, Tclklmin or TCLKHMIN, is 11.9 I/O RegistersMaximum Tclk frequency is 173 174 Resets the TIM counter Prescales the TIM counter clock 175 Prescaler Selection 176 TIM Counter Registers Tcnthtcntl 177 TIM Counter Modulo Registers Tmodhtmodl 178 TIM Channel Status and Control Registers TSC0TSC1 179 See Table 180 Mode, Edge, and Level Selection 181 CHxMAX Latency 182 TIM Channel Registers TCH0H/LTCH1H/L 183 O Ports 184 I/O Port Register Summary $0007 $0008 $0009 $000A $000B $001C $001D 185 186 Port a 3shows the port a I/O logic Data Direction Register a Ddra 188 Port BPort a Pin Functions 6shows the port B I/O logic Data Direction Register B Ddrb 190 Port CPort B Pin Functions 191 Data Direction Register C Ddrc 192 Port DPort C Pin Functions 193 10. Port D Data Register PTD 12shows the port D I/O logic 11. Data Direction Register D Ddrd 195 Port EPort D Pin Functions 196 KBI 15shows the port E I/O logic 14. Data Direction Register E Ddre 198 Port E Pin Functions PTE0-PTE1 / PTE2-PTE3 199 200 17. Optical Interface Voltage References 201 18. Port E Optical Coupling Interface 202 Port F 3shows the port F I/O logic 20. Data Direction Register F Ddrf 204 Port OptionsPort F Pin Functions 205 206 207 Computer Operating Properly COP 1shows the structure of the COP module COP Block Diagram COP I/O Port Register Summary 209 13.4 I/O Signals 210 COP Control Register Copctl Monitor ModeCOP does not generate CPU interrupt requests 211 212 COP Module During Break Mode 213 External Interrupt IRQIRQ module provides a non-maskable interrupt input 214 215 IRQ Module Block Diagram IRQ I/O Port Register Summary 216 217 IRQ Module During Break InterruptsIRQ Status and Control Register Iscr 218 219 Keyboard Interrupt Module KBI 220 221 KBI I/O Register Summary 222 Port-D Keyboard Interrupt Block Diagram 223 224 225 Port-D Keyboard Status and Control Register 226 Port-D Keyboard Interrupt Enable Register 227 228 Port-E Keyboard Interrupt Block Diagram 229 $FFED 230 231 Port-E Keyboard Status and Control Register 232 Port-E Keyboard Interrupt Enable Register 233 234 Port-F Keyboard Interrupt Block Diagram 235 236 237 Port-F Keyboard Status and Control Register 238 Port-F Keyboard Interrupt Enable Register Port-F Pull-up Enable Register Stop ModeKeyboard Module During Break Interrupts 239 240 241 Break Module Break 242 243 Break Module Block Diagram Break I/O Register Summary 244 Break Module Registers 245 Break Status and Control Register Brkscr 246 Break Address Registers Brkh and Brkl 247 Preliminary Electrical Specifications 248 Absolute Maximum Ratings 249 Thermal CharacteristicsFunctional Operating Range 250 DC Electrical Characteristics 251 Oscillator CharacteristicsControl Timing 252 USB DC Electrical Characteristics 253 USB Low Speed Source Electrical Characteristics 254 USB High Speed Source Electrical Characteristics 255 HUB Repeater Electrical Characteristics 256 USB Signaling LevelsTImer Interface Module Characteristics 257 Clock Generation Module Characteristics 258 Acquisition/Lock Time Specifications 259 Mechanical Specifications 260 Plastic Quad Flat Pack QFPPage How to Reach Us

Table 7-3. Interrupt Sources

INT

Register

PLLF

PLLIE

IF11

$FFE6–$FFE7

7.6.2.1 Interrupt Status Register 1

Figure 7-12. Interrupt Status Register 1 (INT1)

MC68HC08KH12 specifications