MEA8000 I/O Ports and Pinouts - Revision history

MacDeath at 21:06, 17 December 2010

2010-12-17T21:06:20Z

← Older revision		Revision as of 21:06, 17 December 2010
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			[[Category:Electronic Component]][[Category:Music and sound]]

	* [[MEA8000]]		* [[MEA8000]]
	* [[MEA8000 I/O Ports and Pinouts]]		* [[MEA8000 I/O Ports and Pinouts]]

Nocash at 14:01, 23 January 2010

2010-01-23T14:01:37Z

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Nocash: /* Command Register (W) (A0=1) */

2010-01-05T15:37:14Z

Command Register (W) (A0=1)

← Older revision		Revision as of 15:37, 5 January 2010
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	* SLOW STOP Mode: After completing the last speech frame, the last frame will be repeated once (with decaying amplitude & same pitch), thereafter, STOP mode is entered.		* SLOW STOP Mode: After completing the last speech frame, the last frame will be repeated once (with decaying amplitude & same pitch), thereafter, STOP mode is entered.

	* CONTINUE Mode: The last speech frame will be repeated indefinetly (until a new 32bit data has been supplyied, or until SLOW STOP mode is selected, or until INSTANT STOP os forced).		* CONTINUE Mode: The last speech frame will be repeated indefinetly (until a new 32bit data has been supplyied, or until SLOW STOP mode is selected, or until INSTANT STOP is forced).

	== MEA8000 Pinouts ==		== MEA8000 Pinouts ==

Nocash: /* Command Register (W) (A0=1) */

2010-01-05T15:36:43Z

Command Register (W) (A0=1)

← Older revision		Revision as of 15:36, 5 January 2010
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	* STOP Mode: Output is silent, REQ is set, next write to Data register will be treated as 8bit Starting Pitch value, to be followed by the 32bit Speech Frame data, thereafter sound output will start (and the device is no longer in STOP Mode).		* STOP Mode: Output is silent, REQ is set, next write to Data register will be treated as 8bit Starting Pitch value, to be followed by the 32bit Speech Frame data, thereafter sound output will start (and the device is no longer in STOP Mode).

	After completing a speech frame (which takes 8..64 ms), the CPU can output another speech frame (by writing another 32bit to the data register), if the CPU doesn't supply new data then Slow Stop or Continue will occur (as selected in the Command Register).		* After completing a speech frame (which takes 8..64 ms), the CPU can output another speech frame (by writing another 32bit to the data register), if the CPU doesn't supply new data then Slow Stop or Continue will occur (as selected in the Command Register).

	* SLOW STOP Mode: After completing the last speech frame, the last frame will be repeated once (with decaying amplitude & same pitch), thereafter, STOP mode is entered.		* SLOW STOP Mode: After completing the last speech frame, the last frame will be repeated once (with decaying amplitude & same pitch), thereafter, STOP mode is entered.

Nocash at 02:58, 5 January 2010

2010-01-05T02:58:36Z

← Older revision		Revision as of 02:58, 5 January 2010
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			* [[MEA8000]]
			* [[MEA8000 I/O Ports and Pinouts]]
			* [[MEA8000 Voice Generator]]

	Philips/Mullard/Signetics MEA8000 Speech Chip		Philips/Mullard/Signetics MEA8000 Speech Chip

Nocash: Created page with 'Philips/Mullard/Signetics MEA8000 Speech Chip == Status Register (R) == 7 REQ Data Request (0=Busy, 1=Data Request) 6-0 N/A Not used == Data Register (W) (A0=0) …'

2010-01-05T02:50:57Z

Created page with 'Philips/Mullard/Signetics MEA8000 Speech Chip == Status Register (R) == 7 REQ Data Request (0=Busy, 1=Data Request) 6-0 N/A Not used == Data Register (W) (A0=0) …'

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Philips/Mullard/Signetics MEA8000 Speech Chip

== Status Register (R) ==

7 REQ Data Request (0=Busy, 1=Data Request)
6-0 N/A Not used

== Data Register (W) (A0=0) ==

If the device is in STOP mode, then first data byte must be the 8bit pitch:
7-0 PITCH Starting Pitch (8bit) (sawtooth) (don't care for noise)
thereafter, 32bit Speech Frame(s) can be written:
31-30 BW1 2bit Bandwidth is? 1st formant
29-28 BW2 2bit Bandwidth of 2nd formant bandwidth "4 KH"
27-26 BW3 2bit Bandwidth of 3rd formant
25-24 BW4 2bit Bandwidth of 4th formant
N/A FM4 0bit Frequency of 4th formant (fixed at 3500 Hz)
23-21 FM3 3bit Frequency of 3rd formant
20-16 FM2 5bit Frequency of 2nd formant resonance frequency
15-11 FM1 5bit Frequency of 1st formant
10-7 AMPL 4bit Amplitude (volume)
6-5 FD 2bit Frame Duration (8,16,32,64 ms)
4-0 PI 5bit Pitch Increment (signed?) (?=Noise)
the 32bit parameter is split into 4bytes (starting with bit31-24). wait for REQ=1 before sending further speech frame(s).

== Command Register (W) (A0=1) ==
7-5 N/A Not used
4 STOP Stop (0=No change, 1=Force Instant Stop)
3-2 CONT Continue (0=No change, 1=No change, 2=Slow Stop, 3=Continue)
1-0 ROE /REQ Output (0=No change, 1=No change, 2=Disable, 3=Enable)

* STOP Mode: Output is silent, REQ is set, next write to Data register will be treated as 8bit Starting Pitch value, to be followed by the 32bit Speech Frame data, thereafter sound output will start (and the device is no longer in STOP Mode).

After completing a speech frame (which takes 8..64 ms), the CPU can output another speech frame (by writing another 32bit to the data register), if the CPU doesn't supply new data then Slow Stop or Continue will occur (as selected in the Command Register).

* SLOW STOP Mode: After completing the last speech frame, the last frame will be repeated once (with decaying amplitude & same pitch), thereafter, STOP mode is entered.

* CONTINUE Mode: The last speech frame will be repeated indefinetly (until a new 32bit data has been supplyied, or until SLOW STOP mode is selected, or until INSTANT STOP os forced).

== MEA8000 Pinouts ==

1-GND 4-D6 7-D3 10-D0 13-VCC 16-OSC IN 19-REF 22-/RD
2-/REQ 5-D5 8-D2 11-A0 14-/REQEN 17-OSC OUT 20-OUT 23-/WR
3-D7 6-D4 9-D1 12-/CE 15-NC 18-CLK IN 21-CLK OUT 24-TEST