projects:sma-time
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projects:sma-time [2017/08/28 11:28] – created emeryth | projects:sma-time [2018/02/26 18:04] – [MCU Pinout] emeryth | ||
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====== Reverse engineering the SMA-Q2/ | ====== Reverse engineering the SMA-Q2/ | ||
+ | by [[people: | ||
+ | |||
+ | ===== Intro ===== | ||
+ | **SMA TIME** also known as **SMA Q2** 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:// | ||
+ | |||
+ | ===== 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| | | ||
+ | |MC3635 (?)|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 | | ||
+ | | | | | ||
+ | |P0.17 | 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.txt · Last modified: 2018/03/03 11:14 by emeryth