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Created Differences Between H1 and H2 models (markdown)

euquiq 2020-06-18 17:28:25 -03:00
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Differences-Between-H1-and-H2-models.md Normal file

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# Audio
At a glance, hardware-side, both models feature a **headphone connector** and the same **AK4951 AUDIO / CODEC IC**. You can get the datasheet [following this link](https://www.akm.com/content/dam/documents/products/audio/audio-codec/ak4951aen/ak4951aen-en-datasheet.pdf).
After close inspection over each model's circuit, several differences are noticed:
## Audio in H2 model
Portapack H2 circuitboard includes a connector header for easily adding an internal speaker.
The **AK4951 IC** is rotated 180º and placed more into the middle of the circuit board, allowing for the addition of an extra IC: The **CS8122S** ultra-low EMI, filter-free, class-D amplifier, for driving the speaker output with up to 3W.
The speaker audio header is switched on/off by the headphone female connector, which includes the usual switch, detecting the insertion of a male plug in it.
## Audio in H1 model
The soldering pads for an internal speaker connector header are present. The speaker +/GND signals on the pad are routed into AK4951 pins 20 (SPP) and 19 (SPN) which are labeled as SPeaker Positive and SPeaker Negative.
**NOTE:** _There is no extra amplifier IC in the middle._