参数资料
型号: MC68HC705V8B
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP56
封装: SDIP-56
文件页数: 160/172页
文件大小: 890K
代理商: MC68HC705V8B
SECTION 11: 16-BIT TIMER
MOTOROLA
Page 77
MC68HC705V8 Specification Rev. 2.1
accompany a successful output compare provided the corresponding interrupt enable bit
(OCIE) is set. After a processor write cycle to the output compare register containing the
MSB ($16), the output compare function is inhibited until the LSB ($17) is also written. The
user must write both bytes (locations) if the MSB is written first. A write made only to the
LSB ($17) will not inhibit the compare function. The free-running counter is updated every
four internal bus clock cycles. The minimum time required to update the output compare
register is a function of the program rather than the internal hardware.
The processor can write to either byte of the output compare register without affecting the
other byte. The output level (OLVL) bit is clocked to the output level register regardless of
whether the output compare flag (OCF) is set or clear.
11.3
INPUT CAPTURE REGISTER - $14:$15
Two 8-bit registers, which make up the 16-bit input capture register, are read-only and are
used to latch the value of the free-running counter after the corresponding input capture
edge detector senses a defined transition. The level transition that triggers the counter
transfer is defined by the corresponding input edge bit (IEDG). Reset does not affect the
contents of the input capture register.
The result obtained by an input capture will be one more than the value of the free-running
counter on the rising edge of the internal bus clock preceding the external transition. This
delay is required for internal synchronization. Resolution is one count of the free-running
counter, which is four internal bus clock cycles.
The free-running counter contents are transferred to the input capture register on each
proper signal transition regardless of whether the input capture flag (ICF) is set or clear.
The input capture register always contains the free-running counter value that corresponds
to the most recent input capture.
After a read of the input capture register MSB ($14), the counter transfer is inhibited until
the LSB ($15) is also read. This characteristic causes the time used in the input capture
software routine and its interaction with the main program to determine the minimum pulse
period. A read of the input capture register LSB ($15) does not inhibit the free-running
counter transfer since they occur on opposite edges of the internal bus clock.
Figure 11-2:
TCAP Timing
TCAP
tTLTL
tTL
tTH
See control timing specifications for TCAP timing requirements.
F
re
e
sc
a
le
S
e
m
ic
o
n
d
u
c
to
r,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
c
..
.
相关PDF资料
PDF描述
MC68HC705V8FN 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQCC68
MC68HC705V8CFN 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PQCC68
MC68HC705X4CDW 8-BIT, OTPROM, 2.2 MHz, MICROCONTROLLER, PDSO28
MC68HC05X4CDW 8-BIT, MROM, 2.2 MHz, MICROCONTROLLER, PDSO28
MC68HC705X4DW 8-BIT, OTPROM, 2.2 MHz, MICROCONTROLLER, PDSO28
相关代理商/技术参数
参数描述
MC68HC706P6ACDW 制造商:Motorola Inc 功能描述:
MC68HC708MP16CFU 制造商:MAJOR 功能描述:
MC68HC711D3CFBE2 制造商:Freescale Semiconductor 功能描述:
MC68HC711D3CFN2 功能描述:IC MCU 2MHZ 4K OTP 44-PLCC RoHS:否 类别:集成电路 (IC) >> 嵌入式 - 微控制器, 系列:HC11 其它有关文件:STM32F101T8 View All Specifications 特色产品:STM32 32-bit Cortex MCUs 标准包装:490 系列:STM32 F1 核心处理器:ARM? Cortex?-M3 芯体尺寸:32-位 速度:36MHz 连通性:I²C,IrDA,LIN,SPI,UART/USART 外围设备:DMA,PDR,POR,PVD,PWM,温度传感器,WDT 输入/输出数:26 程序存储器容量:64KB(64K x 8) 程序存储器类型:闪存 EEPROM 大小:- RAM 容量:10K x 8 电压 - 电源 (Vcc/Vdd):2 V ~ 3.6 V 数据转换器:A/D 10x12b 振荡器型:内部 工作温度:-40°C ~ 85°C 封装/外壳:36-VFQFN,36-VFQFPN 包装:托盘 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... 其它名称:497-9032STM32F101T8U6-ND
MC68HC711D3CFNE2 功能描述:8位微控制器 -MCU 8B OTP 192RAM 2 MHZ RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT