參數資料
型號: MC68HC05RC8FN
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC44
封裝: PLASTIC, LCC-44
文件頁數: 97/122頁
文件大?。?/td> 2962K
代理商: MC68HC05RC8FN
Carrier Modulator Transmitter (CMT)
General Release Specification
MC68HC05RC16 — Rev. 3.0
Carrier Modulator Transmitter (CMT)
9.5.1 Time Mode
When the modulator operates in time mode, the modulation mark and
space periods consist of zero or an integer number of fosc ÷ 8 clocks
(= 250 kHz @ 2 MHz osc). This provides a modulator resolution of 4
s
and a maximum mark and space periods of about 16 ms (each).
However, to prevent carrier glitches which could affect carrier spectral
purity, the modulator control gate and carrier clock are synchronized.
The carrier signal is activated when the modulator gate opens. The
modulator gate can only close when the carrier signal is low (the output
logic level during space periods is low). If the carrier generator is in
baseband mode (BASE bit in MCSR is high), the modulator output will
be at a logic one for the duration of the mark period and at a logic zero
for the duration of a space period. See Figure 9-8.
The mark and space time equations are:
Setting the DIV2 bit in the MCSR will double mark and space times.
tmark
MBUFF
1
+
() 8
×
fosc
----------------------------------------------s
sec
=
tspace
SBUFF
8
×
fosc
------------------------------
s
sec
=
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
..
.
相關PDF資料
PDF描述
MC68HC05RC8P 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDIP28
MC68HC05RC17DW 8-BIT, MROM, 2.097 MHz, MICROCONTROLLER, PDSO28
MC68HC05RC17DW 8-BIT, MROM, 2.097 MHz, MICROCONTROLLER, PDSO28
MC68HC05RC18FN 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQCC44
MC68HC05RC18DW 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
相關代理商/技術參數
參數描述
MC68HC05RC8P 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:General Release Specification
MC68HC05SC24 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Secure 8-bit microcomputer with EEPROM
MC68HC05SR3 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcontroller Units
MC68HC05SU3A 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:Fully static chip design featuring the industry standard 8-bit M68HC05 core
MC68HC05T16 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit