ISD-ES15100_USB Nuvoton Technology Corporation of America, ISD-ES15100_USB Datasheet - Page 9

• Manufacturer Part Number: ISD-ES15100_USB
• Description: BOARD EVALUATION USB FOR I15100
• Manufacturer: Nuvoton Technology Corporation of America
• Series: ChipCorder®r

Specifications of ISD-ES15100_USB

• Main Purpose: Audio, Voice Record/Playback
• Embedded: No
• Utilized Ic / Part: ISD15102, 04, 08, 16, 32
• Primary Attributes: ASIC, 2 ~ 16 Minutes, Up to 48kHz, Class D Amp, Line/Digital/Mic Input
• Secondary Attributes: Graphic User Interface
• Lead Free Status / RoHS Status: Not applicable / Not applicable

If users need really high quality, they might want to try 44.1 kHz sampling rate. According to Table
2-2, users can use an 11.2896 MHz crystal and set the PLL as M = 2, N = 8. In this case users also
have to change the crystal on the EV board.
If the input Clock Source is set to internal Oscillator, the clock rate is fixed at 2.048 MHz. If the input
clock source is set to internal Oscillator with external Resistor, the clock rate can vary with resistor
values. User can type in different resistor values to see the calculated clock rate. User can change
the N and M of the PLL to generate the desired master clock (MCLK) and thus the available sampling
rates.
2.3
Voice prompts are pre-recorded audio of any length, from short words, phrases or sound effects to
long passages of music. These Voice Prompts can be played back in any order as determined by the
users and applications. A voice prompt consists of two components:
Before adding voice prompts, first set the default sampling rate (A) and compression algorithm (B).
To add voice prompts, follow the steps below:
If users change the clock configuration on ‘Device/Clocks’ screen, they must re-compress all VPs (K)
because clock setting is part of the VP compression.
Users can evaluate the VPs through PC or EV board:
(1) An index pointing to the pre-recorded audio.
(2) Pre-recorded audio.
(1) Set sampling rate (C) and compression algorithm (D) for the VPs you are going to add. Users
(2) Add voice prompts (G).
(3) Repeat steps (1) & (2).
(4) Change the VP tags (H) if needed; by default, the tags are the filenames.
(5) Re-order the VPs if needed; select VP by clicking on the square (I), and click on the up/down
Voice Prompt
can change the individual VP’s sampling rate (E) and/or compression algorithm (F) later
when evaluating the quality.
arrows (J) to re-order the VPs.
•
•
Through PC (L):
Through EV board:
iii. Compressed voice prompts.
ii. Re-sampled but not yet compressed voice prompts.
i. Original voice prompts before re-sampling & compression.
i. Plug in the EV board and the ‘Play to device’ button (M) shows up. Switch to
‘Configuration’ screen to set a playback path and come back to click on the
‘Play to device’ button (M).
2.8224
11.2896
3.072
12.288
Table 2-2 PLL M & N Settings
2
2
2
2
32
32
8
8
Publication Release Date: May 21, 2008
44.1
44.1
48
48
PRELIMINARY
Revision 151.003
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