SB9600: Difference between revisions
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SB9600 is a Motorola proprietary TLL communications protocol. It uses a pair of inverted signal lines, BUS+ and BUS-, along with a BUSY (and complementary | SB9600 is a Motorola proprietary TLL communications protocol. It uses a pair of inverted signal lines, BUS+ and BUS-, along with a BUSY (and complementary /BUSY) signal, to communicate between various components inside a radio, or between a radio and its control head. | ||
Radios known to use SB9600 for control include: | |||
* [[MTS2000]] and [[MCS2000]] | |||
* [[Astro Spectra]] | |||
* All [[Astro25]] radios | |||
= Phy Layer = | = Phy Layer = | ||
[[File:MAEPF-27781-O-SB9600-Timing-Chart.PNG|thumb|left|400px|SB9600 signal diagram from the [[XTL2500]] detailed service manual]] | |||
The physical layer of SB9600 consists of complementary data and control lines. BUS+ & BUS- are bidirectional data lines and are complements of each other. BUS+ is active low and is essentially a standard UART line. BUS- is simply the inverse of BUS+. BUSY & /BUSY are bidirectional control lines used to avoid data collision and ensure only one device on the SB9600 bus is transmitting data at any given time. | |||
=== BUS+ & BUS- === | |||
=== BUSY & /BUSY === | |||
Revision as of 19:45, 28 January 2022
SB9600 is a Motorola proprietary TLL communications protocol. It uses a pair of inverted signal lines, BUS+ and BUS-, along with a BUSY (and complementary /BUSY) signal, to communicate between various components inside a radio, or between a radio and its control head.
Radios known to use SB9600 for control include:
- MTS2000 and MCS2000
- Astro Spectra
- All Astro25 radios
Phy Layer
The physical layer of SB9600 consists of complementary data and control lines. BUS+ & BUS- are bidirectional data lines and are complements of each other. BUS+ is active low and is essentially a standard UART line. BUS- is simply the inverse of BUS+. BUSY & /BUSY are bidirectional control lines used to avoid data collision and ensure only one device on the SB9600 bus is transmitting data at any given time.
