A68064 Datasheet [top] -

void writeA68064(byte data) // Shift out 8 bits, MSB first (output 1 = MSB) for (int i = 7; i >= 0; i--) digitalWrite(dataPin, (data >> i) & 1); digitalWrite(clockPin, HIGH); delayMicroseconds(1); digitalWrite(clockPin, LOW); Understanding the A68064 Datasheet: A Guide to the

• Operating voltage: 1.8–3.6 V
• Low-power modes (Sleep, Deep Sleep, Standby)
• Typical active current: ~70–120 µA/MHz (application dependent)

• VDD range: 1.8–3.6 V
• Iddle/sleep: <1 µA (deep sleep, RTC on)
• Iactive: ~70–120 µA/MHz (core only)
• ADC input range: 0–Vref (Vref typically 3.0 V or VDD)
• GPIO drive: up to 20 mA per pin (max; consult package thermal limits)
• ESD protection: ±4 kV HBM on I/O pins (typical)