参数资料
型号: MC68HC05RC8P
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, PDIP28
封装: PLASTIC, DIP-28
文件页数: 97/122页
文件大小: 445K
代理商: MC68HC05RC8P
Carrier Modulator Transmitter (CMT)
General Release Specification
MC68HC05RC16 — Rev. 3.0
76
Carrier Modulator Transmitter (CMT)
MOTOROLA
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
=
相关PDF资料
PDF描述
MC68HC908QT4VP 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP8
MC68HC908JL3ADW 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDSO28
MC68HC908JL3MFA 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP48
MC68HLC908JL3CP 8-BIT, FLASH, MICROCONTROLLER, PDIP28
MC68360ZP25VL 4 CHANNEL(S), 10M bps, LOCAL AREA NETWORK CONTROLLER, PBGA357
相关代理商/技术参数
参数描述
MC68HC05SC24 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:Secure 8-bit microcomputer with EEPROM
MC68HC05SR3 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:High-density Complementary Metal Oxide Semiconductor (HCMOS) Microcontroller Units
MC68HC05SU3A 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:Fully static chip design featuring the industry standard 8-bit M68HC05 core
MC68HC05T16 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:High-density complementary metal oxide semiconductor (HCMOS) microcontroller unit
MC68HC05V12 制造商:FREESCALE 制造商全称:Freescale Semiconductor, Inc 功能描述:HCMOS Microcontreller Unit