參數(shù)資料
型號: MC68HC05RC18P
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, PDIP28
封裝: PLASTIC, DIP-28
文件頁數(shù): 106/126頁
文件大?。?/td> 1180K
代理商: MC68HC05RC18P
NON-DISCLOSURE
AGREEMENT
REQUIRED
Carrier Modulator Transmitter (CMT)
General Release Specification
MC68HC05RC18 Rev. 2.1
78
Carrier Modulator Transmitter (CMT)
Freescale Semiconductor
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 1 for the duration of the mark period and at a logic 0 for the
duration of a space period. See Figure 9-5.
The mark and space time equations are:
Setting the DIV2 bit in the MCSR will double mark and space times.
Figure 9-5. CMT Operation in Time Mode
tmark
MBUFF
1
+
() 8
×
fosc
----------------------------------------------s
sec
=
tspace
SBUFF
8
×
fosc
------------------------------
s
sec
=
MODULATOR GATE
fOSC ÷ 8
TIME MODE OUTPUT
BASEBAND OUTPUT
MARK
SPACE
MARK
SPACE
CARRIER FREQUENCY
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