Differences

This shows you the differences between two versions of the page.

--- projects:sma-time [2017/08/28 11:30] – emeryth
+++ projects:sma-time [2018/03/03 11:14] (current) – emeryth
@@ Line 1: / Line 1: @@
 ====== Reverse engineering the SMA-Q2/SMA-Time smartwatch ======
 by [[people:emeryth:start|emeryth]] (emeryth at hackerspace.pl)
+{{:projects:hsyrenka.jpg?direct&500|}}
+===== Intro =====
+**SMA Q2** also known as **SMA TIME** is a Chinese smartwatch similar in design and features to the Pebble Time. \\
+Featuring a color Memory LCD, heart rate sensor and a NRF52832 Bluetooth SoC to drive it all. \\
+All the documents and interesting things are uploaded here: https://owncloud.hackerspace.pl/index.php/s/1bqTRwMI8XKXGKL
+===== Hardware =====
+==== Chips ====
+^IC ^Description ^ Datasheet ^
+|NRF52832-QFAAB0| Main SoC| |
+|LP2985 (?)| 3.3V LDO for everything| |
+|LP2985 (?)| 3.3V LDO for heart rate sensor module| |
+|BQ24086 (?)| Battery charger| |
+|KX022-1020 |3-Axis acccelerometer| |
+|PAH8002|Heart rate sensor| |
+|GD25Q16C (?)|16Mbit SPI flash| |
+|LPM013M126A (?)|176x176 Japan Display Color memory LCD| |
+==== MCU Pinout ====
+^Pin ^Description ^
+|P0.02 | LCD SCLK |
+|P0.03 | LCD SI |
+|P0.05 | LCD SCS |
+|P0.06 | LCD EXTCOMIN |
+|P0.07 | LCD DISP |
+| | |
+|P0.04 | Battery voltage measurement (x0.25 divider) |
+| | |
+|P0.08 | BACKLIGHT ON |
+| | |
+|P0.09 | BUTTON BACK |
+|P0.27 | BUTTON UP |
+|P0.28 | BUTTON OK |
+|P0.29 | BUTTON DOWN |
+| | |
+|P0.11 | FLASH MISO |
+|P0.12 | FLASH CS |
+|P0.13 | FLASH MOSI |
+|P0.14 | FLASH CLK |
+| | |
+|P0.25 | UART RX |
+|P0.26 | UART TX |
+| | |
+|P0.30 | VIBRATOR ON |
+| | |
+|P0.15 | ACCEL INT ? |
+|P0.16 | ACCEL POWER |
+|P0.17 | ACCEL SDA |
+|P0.18 | ACCEL SCL |
+| | |
+|P0.19 | HRM SDA |
+|P0.20 | HRM SCL |
+|P0.22 | HRM INT? |
+|P0.10 | HRM RESET? |
+|P0.31 | HRM POWER ON |