From 2e604e6768bad0f9325a1e12c5205658359bfa0c Mon Sep 17 00:00:00 2001 From: euquiq <31453004+euquiq@users.noreply.github.com> Date: Thu, 18 Jun 2020 18:11:00 -0300 Subject: [PATCH] Updated Differences Between H1 and H2 models (markdown) --- Differences-Between-H1-and-H2-models.md | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/Differences-Between-H1-and-H2-models.md b/Differences-Between-H1-and-H2-models.md index 057d68d..c9cfe3c 100644 --- a/Differences-Between-H1-and-H2-models.md +++ b/Differences-Between-H1-and-H2-models.md @@ -2,12 +2,14 @@ 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)). +The AK4951 includes separate pins for speaker and headphone output. + Upon close inspection, several differences arise: ## 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 **AK4951 IC** is rotated 180º and placed more into the middle of the circuit board, allowing for the addition of an extra IC: The ChipStar brand **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. @@ -15,5 +17,5 @@ The speaker audio header is switched on/off by the headphone female connector, w 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 between the speaker pad and the AK4951. The AK4951 includes a 1W, 8ohm Speaker amplifier_ +**NOTE:** _There is no extra amplifier IC between the speaker pad and the AK4951. The AK4951 includes a speaker amplifier capable of 1W, when powered @5v._