SB9600 - Revision history

W3AXL: /* Phy Layer */

2023-03-19T18:12:21Z

Phy Layer

← Older revision		Revision as of 18:12, 19 March 2023
Line 7:		Line 7:
	* All [[Astro25]] radios		* All [[Astro25]] radios

	= ~~Phy~~ Layer =		= Physical Layer =

	[[File:MAEPF-27781-O-SB9600-Timing-Chart.PNG\|thumb\|left\|400px\|SB9600 signal diagram from the [[XTL2500]] detailed service manual]]		[[File:MAEPF-27781-O-SB9600-Timing-Chart.PNG\|thumb\|left\|400px\|SB9600 signal diagram from the [[XTL2500]] detailed service manual. Note that this diagram incorrectly shows the BUSY signal as active high. The original SB9600 specification document calls for BUSY to be active low and /BUSY (not present on the XTL2500) to be active high]]

	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.		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- ~~===~~		{\| class="wikitable" style="margin:auto"
			\|+ SB9600 Signal Lines
	~~===~~ BUSY ~~& /~~BUSY ~~===~~		\|-
			! Name !! Description !! Default State
			\|-
			\| BUS- \|\| Bidirectional differential data bus, active high \|\| Low (0V)
			\|-
			\| BUS+ \|\| Bidirectional differential data bus, active low \|\| High (5V)
			\|-
			\| /BUSY \|\| Bidirectional busy indicator, active high. Used for collision avoidance. \|\| Low (0V)
			\|-
			\| BUSY \|\| Bidirectional busy indicator, active low. Used for collision avoidance \|\| High (5V)
			\|}

W3AXL at 00:45, 29 January 2022

2022-01-29T00:45:45Z

← Older revision		Revision as of 00:45, 29 January 2022
Line 1:		Line 1:
	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 ~~{{overline\|~~BUSY}} signal for ~~collision avoidance.~~		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 ===

W3AXL: Created page with "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 {{overline|BUSY}} si..."

2022-01-28T23:50:03Z

Created page with "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 {{overline|BUSY}} si..."

New page

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 {{overline|BUSY}} signal for collision avoidance.

= Phy Layer =