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projects:sma-time [2018/01/01 18:18] emerythprojects:sma-time [2018/03/03 11:14] (current) emeryth
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 ====== Reverse engineering the SMA-Q2/SMA-Time smartwatch ====== ====== Reverse engineering the SMA-Q2/SMA-Time smartwatch ======
 by [[people:emeryth:start|emeryth]] (emeryth at hackerspace.pl) by [[people:emeryth:start|emeryth]] (emeryth at hackerspace.pl)
 +
 +{{:projects:hsyrenka.jpg?direct&500|}}
  
 ===== Intro ===== ===== Intro =====
-**SMA TIME** also known as **SMA Q2** is a Chinese smartwatch similar in design and features to the Pebble Time. \\ +**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.+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 | 
 + 
projects/sma-time.1514830695.txt.gz · Last modified: 2018/01/01 18:18 by emeryth

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