参数资料
型号: MC68HC05RC16FN
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC44
封装: PLASTIC, LCC-44
文件页数: 91/122页
文件大小: 2962K
代理商: MC68HC05RC16FN
Carrier Modulator Transmitter (CMT)
General Release Specification
MC68HC05RC16 — Rev. 3.0
Carrier Modulator Transmitter (CMT)
9.4 Carrier Generator
The carrier signal is generated by counting a predetermined number of
input clocks (500 ns for a 2-MHz oscillator) for both the carrier high time
and the carrier low time. The period is determined by the total number of
clocks counted. The duty cycle is determined by the ratio of high time
clocks to total clocks counted. The high and low time values are user
programmable and are held in two registers. An alternate set of high/low
count values is held in another set of registers to allow the generation of
dual frequency FSK (frequency shift keying) protocols without CPU
intervention. The MCGEN bit in the MCSR must be set and the BASE bit
in the MCSR must be cleared to enable carrier generator clocks. The
block diagram is shown in Figure 9-2.
Figure 9-2. Carrier Generator Block Diagram
CLK
6-BIT UP COUNTER
=?
CLR
CLOCK
AND
OUTPUT
CONTROL
PRIMARY HIGH COUNT REGISTER
SECONDARY HIGH COUNT REGISTER
COUNT
REGISTER
SELECT
CONTR
OL
MODE
PRIMARY/
SELECT
CARRIER OUT
SECONDARY
BASE
fOSC
MODULATOR/
CARRIER GENERATOR
ENABLE
PRIMARY LOW COUNT REGISTER
SECONDARY LOW COUNT REGISTER
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
MC68HRC705SP7CP 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP28
MPC8270CVRQLDX 32-BIT, 333 MHz, RISC PROCESSOR, PBGA516
MSM80C85AHJS 8-BIT, 5 MHz, MICROPROCESSOR, PQCC44
MC9S12HZ128MPV 16-BIT, FLASH, 25 MHz, MICROCONTROLLER, PQFP112
MSP430F2234IDA 16-BIT, FLASH, 16 MHz, RISC MICROCONTROLLER, PDSO38
相关代理商/技术参数
参数描述
MC68HC05RC16P 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:General Release Specification
MC68HC05RC8 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:General Release Specification
MC68HC05RC8DW 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:General Release Specification
MC68HC05RC8FN 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:General Release Specification
MC68HC05RC8P 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:General Release Specification