Category:84PCSE:General Hardware Information - Revision history

Dr. D'nar: Battery warning

2014-11-04T18:23:33Z

Battery warning

Dr. D'nar: Woah! Media in categories.

2014-10-22T00:45:26Z

Woah! Media in categories.

Dr. D'nar: Added PCB photos

2014-10-22T00:25:46Z

Added PCB photos

Dr. D'nar: Created page with 'The TI-84+CSE uses the same ASIC as the TI-84+/SE, so the hardware ports are mostly the same. Ports 0E and 0F have always been functional, but they were previously useless; they …'

2013-02-20T05:34:49Z

Created page with 'The TI-84+CSE uses the same ASIC as the TI-84+/SE, so the hardware ports are mostly the same. Ports 0E and 0F have always been functional, but they were previously useless; they …'

New page

The TI-84+CSE uses the same ASIC as the TI-84+/SE, so the hardware ports are mostly the same. Ports 0E and 0F have always been functional, but they were previously useless; they are now used to swap flash. Port 21 now normally hold 02. Ports 10h and 11h are totally different. See [[Category:83Plus:Ports:By Address]].

← Older revision		Revision as of 18:23, 4 November 2014
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	The TI-84+CSE uses the same ASIC as the TI-84+/SE, so the hardware ports are mostly the same. Ports 0E and 0F have always been functional, but they were previously useless; they are now used to swap flash. Port 21 now normally hold 02. Ports 10h and 11h are totally different. See also [[Category:83Plus:Ports:By Address]].		The TI-84+CSE uses the same ASIC as the TI-84+/SE, so the hardware ports are mostly the same. Ports 0E and 0F have always been functional, but they were previously useless; they are now used to swap flash. Port 21 now normally hold 02. Ports 10h and 11h are totally different. See also [[Category:83Plus:Ports:By Address]].
		+
		+	'''WARNING:''' The TI-84+CSE does not appear to have a hardware-based low-voltage shutdown on the ASIC. As a result, it appears that ''an assembly program can run the battery all the way down and render the battery useless''. If your software overrides the OS interrupt handler, you '''must''' check the battery charge level yourself, or have some other way to prevent the battery from being run down.
		+
		+	A quick look at the ASIC PCB photos shows that the LCD backlight dimmer (CAT4004A or work-alike) is connected directly to the battery. Its low-voltage shutdown threshold is 2.0 V, by which point the battery is long past unrecoverable. There could be a hidden circuit that overrides the dimming control pin (and thereby turn the backlight off), but I doubt it.

← Older revision		Revision as of 00:45, 22 October 2014
Line 1:		Line 1:
	The TI-84+CSE uses the same ASIC as the TI-84+/SE, so the hardware ports are mostly the same. Ports 0E and 0F have always been functional, but they were previously useless; they are now used to swap flash. Port 21 now normally hold 02. Ports 10h and 11h are totally different. See also [[Category:83Plus:Ports:By Address]].		The TI-84+CSE uses the same ASIC as the TI-84+/SE, so the hardware ports are mostly the same. Ports 0E and 0F have always been functional, but they were previously useless; they are now used to swap flash. Port 21 now normally hold 02. Ports 10h and 11h are totally different. See also [[Category:83Plus:Ports:By Address]].
−
−	~~[[File:TI-84_Plus_C_SE_PCB_%28main_circuits%29.jpeg\|200px\|thumb\|right\|Main circuits of TI-84+CSE PCB. Click for higher resolution.]]~~
−	~~[[File:TI-84_Plus_C_SE_PCB_lower_half.jpg\|200px\|thumb\|right\|Lower half of TI-84+CSE PCB. Click for higher resolution.]]~~

← Older revision		Revision as of 00:25, 22 October 2014
Line 1:		Line 1:
−	The TI-84+CSE uses the same ASIC as the TI-84+/SE, so the hardware ports are mostly the same. Ports 0E and 0F have always been functional, but they were previously useless; they are now used to swap flash. Port 21 now normally hold 02. Ports 10h and 11h are totally different. See [[Category:83Plus:Ports:By Address]].	+	The TI-84+CSE uses the same ASIC as the TI-84+/SE, so the hardware ports are mostly the same. Ports 0E and 0F have always been functional, but they were previously useless; they are now used to swap flash. Port 21 now normally hold 02. Ports 10h and 11h are totally different. See also [[Category:83Plus:Ports:By Address]].
		+
		+	[[File:TI-84_Plus_C_SE_PCB_%28main_circuits%29.jpeg\|200px\|thumb\|right\|Main circuits of TI-84+CSE PCB. Click for higher resolution.]]
		+	[[File:TI-84_Plus_C_SE_PCB_lower_half.jpg\|200px\|thumb\|right\|Lower half of TI-84+CSE PCB. Click for higher resolution.]]