参数资料
型号: MC68HC05RC18FN
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: 98/126页
文件大小: 1180K
代理商: MC68HC05RC18FN
Carrier Modulator Transmitter (CMT)
MC68HC05RC18 Rev. 2.1
General Release Specification
Freescale Semiconductor
Carrier Modulator Transmitter (CMT)
71
NON-DISCLOSURE
AGREEMENT
REQUIRED
output (baseband), or directly route the carrier to the modulator output
while providing a signal to switch the carrier generator between high/low
time register buffers (FSK). See 9.5 Modulator.
The transmitter output block controls the state of the infrared out pin
(IRO). The modulator output is gated on to the IRO pin when the
modulator/carrier generator is enabled. Otherwise, the IRO pin is
controlled by the state of the IRO latch, which is directly accessible to the
CPU by means of bit 7 of the carrier generator data registers CHR1 and
CLR1. The IRO latch can be written to on either edge of the internal bus
clock (fosc/2), allowing for IR waveforms which have a resolution of twice
the bus clock frequency (fosc). See 9.4.2 Carrier Generator Data
Figure 9-1. Carrier Modulator Transmitter Module Block Diagram
fOSC
CARRIER
GENERATOR
MODULATOR
CARRIER
OUT
MODULATOR
OUT
MODULATOR/
TRANSMITTER
OUTPUT
BASE
MODE
PRIMARY/SECONDARY SELECT
CPU INTERFACE
IRO
PIN
EO
C
F
LA
G
fOSC ÷ 2
DB
AB
EOC INTERRUPT
EOC
ENABLE
.
INT
ERRUPT
CARRIER
ENABLE
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