Update: 29 September, 2023
This document describes the features and characteristics of the PCA146x series 32 kHz watch circuits, including frequency stability, high immunity of the oscillator to leakage currents, time calibration that is electrically programmable and reprogrammable via EEPROM, low current consumption with only a quartz crystal as the external component, output for different types of bipolar stepping motors, up to 50% reduction in motor current compared to conventional circuits by adapting the motor pulse width to match the required torque, on-chip detection of induced motor voltage to prevent loss of motor steps, detector for lithium or silver-oxide battery voltage levels, indication for battery end-of-life, stop function for accurate timing, power-on reset for fast testing, and various test modes for testing the mechanical parts of the watch and the IC.
File format: PDF
Size: -
MD5 Checksum: 03F55F48767416AB07E24570056273AB
Publication date: 05 July, 2012
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PDF Link: PHILIPS PCA146x series 32 kHz watch circuits with adaptive motor pulse handbook PDF