參數資料
型號： MC68HC705F4FB
廠商： FREESCALE SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 1.789 MHz, MICROCONTROLLER, PQFP44
封裝： PLASTIC, QFP-44
文件頁數： 89/130頁
文件大小： 10504K
代理商： MC68HC705F4FB
MC68HC05F4
6-11
16-BIT PROGRAMMABLE TIMER
6
6.4
Output compare
‘Output compare’ is a technique which may be used, for example, to generate an output waveform,
or to signal when a specic time period has elapsed, by presetting the output compare register to
the appropriate value.
There are two output compare registers: output compare register 1 (OCR1) and output compare
register 2 (OCR2).
There are two output compare interrupt enable bits (OC1IE and OC2IE).
6.4.1
Output compare register 1 (OCR1)
The 16-bit output compare register 1 is made up of two 8-bit registers at locations $0022 (MSB)
and $0023 (LSB). The contents of the output compare register 1 are compared with the contents
of the free-running counter continually and, if a match is found, the corresponding output compare
ag (OC1F) in the timer status register is set. If the timer compare output enable bit (CO1E) is set,
the output level (OLVL1) is transferred to pin TCMP1. The output compare register 1 values and
the output level bit should be changed after each successful comparison to establish a new
elapsed timeout. An interrupt can also accompany a successful output compare provided the
corresponding interrupt enable bit (OC1IE) is set. (The free-running counter is updated every four
internal bus clock cycles.)
After a processor write cycle to the output compare register 1 containing the MSB ($0022), the
output compare function is inhibited until the LSB ($0023) is also written. The user must write both
bytes (locations) if the MSB is written rst. A write made only to the LSB ($0023) will not inhibit the
compare 1 function. The processor can write to either byte of the output compare register 1 without
affecting the other byte. If the timer compare output enable bit (CO1E) is set, the output level
(OLVL1) bit is clocked to the output level register and hence to the TCMP1 pin whether the output
compare ag 1 (OC1F) is set or clear. The minimum time required to update the output compare
register 1 is a function of the program rather than the internal hardware. Because the output
compare ag 1 and the output compare register 1 are not dened at power on, and not affected
by reset, care must be taken when initializing output compare functions with software. The
following procedure is recommended:
–
Write to output compare 1 high to inhibit further compares;
–
Read the timer status register to clear OC1F (if set);
–
Write to output compare 1 low to enable the output compare 1 function.
Address
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
Output compare 1 high (OCR1H)
$0022
Undened
Output compare 1 low (OCR1L)
$0023
Undened
TPG
57
05F4Book Page 11 Tuesday, August 5, 1997 1:10 pm
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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相關PDF資料
PDF描述
MC68HC05F4FB 8-BIT, MROM, 1.789 MHz, MICROCONTROLLER, PQFP44
MC68HC05F4CDW 8-BIT, MROM, 1.789 MHz, MICROCONTROLLER, PDSO28
MC68HC705G4 8-BIT, OTPROM, 1 MHz, MICROCONTROLLER, PQFP80
MC68HC05G3 8-BIT, OTPROM, 2 MHz, MICROCONTROLLER, PQFP80
MC68HC705J5ACJP 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP16
相關代理商/技術參數
參數描述
MC68HC705G1B 制造商:Rochester Electronics LLC 功能描述:- Bulk
MC68HC705J1A 制造商:Freescale Semiconductor 功能描述:
MC68HC705J1ACDW 功能描述:IC MCU 4MHZ 1.2K OTP 20-SOIC RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:HC05 其它有關文件:STM32F101T8 View All Specifications 特色產品:STM32 32-bit Cortex MCUs 標準包裝:490 系列:STM32 F1 核心處理器:ARM? Cortex?-M3 芯體尺寸:32-位 速度:36MHz 連通性:I²C，IrDA，LIN，SPI，UART/USART 外圍設備:DMA，PDR，POR，PVD，PWM，溫度傳感器，WDT 輸入/輸出數:26 程序存儲器容量:64KB（64K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):2 V ~ 3.6 V 數據轉換器:A/D 10x12b 振蕩器型:內部 工作溫度:-40°C ~ 85°C 封裝/外殼:36-VFQFN，36-VFQFPN 包裝:托盤 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名稱:497-9032STM32F101T8U6-ND
MC68HC705J1ACP 功能描述:IC MCU 4MHZ 1.2K OTP 20-DIP RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:HC05 其它有關文件:STM32F101T8 View All Specifications 特色產品:STM32 32-bit Cortex MCUs 標準包裝:490 系列:STM32 F1 核心處理器:ARM? Cortex?-M3 芯體尺寸:32-位 速度:36MHz 連通性:I²C，IrDA，LIN，SPI，UART/USART 外圍設備:DMA，PDR，POR，PVD，PWM，溫度傳感器，WDT 輸入/輸出數:26 程序存儲器容量:64KB（64K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:10K x 8 電壓 - 電源 (Vcc/Vdd):2 V ~ 3.6 V 數據轉換器:A/D 10x12b 振蕩器型:內部 工作溫度:-40°C ~ 85°C 封裝/外殼:36-VFQFN，36-VFQFPN 包裝:托盤 配用:497-10030-ND - STARTER KIT FOR STM32497-8853-ND - BOARD DEMO STM32 UNIV USB-UUSCIKSDKSTM32-PL-ND - KIT IAR KICKSTART STM32 CORTEXM3497-8512-ND - KIT STARTER FOR STM32F10XE MCU497-8505-ND - KIT STARTER FOR STM32F10XE MCU497-8304-ND - KIT STM32 MOTOR DRIVER BLDC497-6438-ND - BOARD EVALUTION FOR STM32 512K497-6289-ND - KIT PERFORMANCE STICK FOR STM32MCBSTM32UME-ND - BOARD EVAL MCBSTM32 + ULINK-MEMCBSTM32U-ND - BOARD EVAL MCBSTM32 + ULINK2更多... 其它名稱:497-9032STM32F101T8U6-ND
MC68HC705J1ACPE 功能描述:8位微控制器 -MCU HCO5 CORE+1.2K RAM + EPR RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
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