参数资料
型号: MC68HC05RC8DW
厂商: MOTOROLA INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PDSO28
封装: SOIC-28
文件页数: 96/122页
文件大小: 445K
代理商: MC68HC05RC8DW
Carrier Modulator Transmitter (CMT)
Modulator
MC68HC05RC16 — Rev. 3.0
General Release Specification
MOTOROLA
Carrier Modulator Transmitter (CMT)
75
The modulator can operate in two modes, time or FSK. In time mode the
modulator counts clocks derived from the system oscillator and
modulates a single-carrier frequency or no carrier (baseband). In FSK
mode, the modulator counts carrier periods and instructs the carrier
generator to alternate between two carrier frequencies whenever a
modulation period (mark + space counts) expires.
Figure 9-7. Modulator Block Diagram
=?
0
COUNTER
fOSC
EOC FLAG
MBUFF
SBUFF
SREG *
13-BIT DOWN COUNTER *
* DENOTES HIDDEN REGISTER
12 BITS
MS
BIT
12
CONTROL/STATUS REGISTER
MODULATOR
EOC INTERRUPT ENABLE
BASE
MODE
8
CLOCK CONTROL
CARRIER OUT
LOAD MBUFF/SBUFF
SYSTEM CONTROL
EOC
FLAG
SET
MODULATOR GATE
OUT
PRIMARY/SECONDARY SELECT
.
MODULATOR
MODULATOR/
CARRIER GENERATOR.
ENABLE
EXTENDED
SPACE
DIV2
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