FEDL22594-06
Issue Date: Oct. 16. 2017
ML22594-xxxMB
4-Channel Mixing Speech Synthesis LSI with Built-in MASK ROM for Automotive
1/73
GENERAL DESCRIPTION
The ML22594-xxx is 4-channel mixing speech synthesis LSIs with built-in MASK ROM for voice data. These
LSIs incorporate into them an HQ-ADPCM decoder that enables high sound quality, 16-bit D/A converter,
low-pass filter, 1.0 W monaural speaker amplifier for driving speakers , and over-current detectible function for
Speaker Pins. And the high quality and a long time sound regeneration is possible by using the voice
regeneration which the outside ROM was used for.
Since functions necessary for voice output are all integrated into a single chip, a system can be upgraded with
audio features by only using one of these LSIs.
•
Capacity of internal memory and the maximum voice production time (when HQ-ADPCM
※
1
method used)
Product name
ROM capacity
Maximum voice production time (sec)
f
sam
= 8.0 kHz
f
sam
= 16.0 kHz
f
sam
= 32.0 kHz
ML22594- xxx
6 Mbits(Internal)
243
121
60
128 Mbits(Exteranal)
5240
2620
1310
FEATURES
•
ROM capacity:
Internal 6Mbits, External 128Mbits (Max)
•
Speech synthesis method:
Can be specified for each phrase.
HQ-ADPCM / 8-bit non-linear PCM / 8-bit PCM / 16-bit PCM
•
Sampling frequency:
Can be specified for each phrase.
12.0/24.0/48.0 kHz, 8.0/16.0/32.0 kHz, 6.4/12.8/25.6 kHz
•
Built-in low-pass filter and 16-bit D/A converter
•
Built-in speaker driver amplifier:
1.0 W, 8
Ω
(at DV
DD
= 5 V)
(with over-current detectible function for Speaker pins)
•
External analog voice input (built-in analog mixing function)
•
CPU command interface:
Clock synchronous serial interface
•
Maximum number of phrases:
1024 phrases, from 000h to 3FFh
•
Edit ROM
•
Volume control:
CVOL command: Adjustable through 32 levels (including OFF)
AVOL command: Adjustable through 50 levels (including OFF)
•
Repeat function:
LOOP command
•
Channe
ｌ
mixing function:
4 channels
•
Power supply voltage detection function: Can be controlled at six levels from 2.7 to 4.0 V (including the
OFF setting)
•
Source oscillation frequency:
4.096 MHz
•
Power supply voltage:
4.5 to 5.5 V
•
Operating temperature range:
–40
°
C to +105
°
C
※
2
•
Package:
heat sink type 30-pin plastic SSOP(P-SSOP30-56-0.65-Z6K)
•
Product name:
ML22594-xxxMB (“xxx” denotes ROM code number)
※
1
HQ-ADPCM is a high sound quality audio compression technology of "Ky's".
“
Ｋｙ
’
ｓ
” is a Registered trademark of National Universities corporate Kyushu
Institute of Technology
※
2 The limitation on the operation time changes by the using condition.
(Refer to "LIMITATION ON THE OPERATION TIME (PLAY-BACK TIME)")
