参数资料
| 型号： | AC164142 |
| 厂商： | Microchip Technology |
| 文件页数： | 24/38页 |
| 文件大小： | 0K |
| 描述： | BOARD DAUGHTER PWR LINE MODEM |
| 特色产品： | AC164142 PICtail? Plus Daughter Board |
| 标准包装： | 1 |
| 系列： | PICtail™ Plus |
| 主要目的： | 接口，电源线路收发器 |
| 嵌入式： | 否 |
| 主要属性： | AC 电源线收发器，BPSK 7.2 Kbps |
| 次要属性： | 需要 Explorer 16 板 |
| 已供物品： | 2 板，线缆，文档 |
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Consumer-band BPSK 7.2 kbps PLM PICtail? Plus Daughter Board User’s Guide
The memory and MIPS requirements for the modem software for different baud rates
TABLE 3-1:
MEMORY AND MIPS REQUIREMENTS FOR THE MODEM
Baud Rate
1200
2400
3600
4800
5400
7200
RAM (Bytes)
700
412
316
268
252
220
Flash (Bytes)
2709
2709
2709
2709
2709
2709
MIPS
33.5
33.6
33.7
33.9
33.9
34.1
3.1.6
Developing Custom Applications
An application template has been provided to ease the development of customized
PLM applications. The application template can be downloaded from the
Consumer-band BPSK 7.2 kbps PLM PICtail Plus Daughter Board web site at:
By default, the software for the daughter board is designed to operate on a carrier
frequency of 129.6 kHz. However, if required, the software can be modified to operate
at a different carrier frequency. In this case, the following need to be taken into
consideration:
? The hardware provided in the kit is designed to operate at a carrier frequency of
129.6 kHz. Changing the carrier frequency in software will require modifications to
the hardware components, specifically the components that decide the filter cutoff
frequencies
? It is necessary for the carrier frequency to be an integral multiple of the baud rate:
Carrier frequency, F C = k * baud, k ? Integer
? Lower carrier frequencies result in lower maximum possible data rates
? Carrier frequency or baud rate changes outside the combinations provided in the
include file ( ...\modem\bpsk\bpsk_filter.inc ) will require recalculation of
digital filter coefficients
? Increasing carrier frequency increases the MIPS requirement for the modem soft-
ware. For this reason, the carrier frequency must be well within the CPU’s useful
performance limit. The modem software requires approximately 0.234 to 0.303
MIPS/kHz of carrier frequency
DS70656A-page 24
? 2011 Microchip Technology Inc.
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