SLLA673 March   2025 MCF8315A , MCF8315C , MCF8315D , MCF8316A , MCF8316C-Q1 , MCF8316D

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 MCF8315 Block Diagram and Pin Functions Introduction
  5. 2Fan Application Hardware Architecture
    1. 2.1 Total Discrete Hardware Design
    2. 2.2 MCU+Pre-Driver and External FET Design
    3. 2.3 All in One Design
  6. 3MCF8315 Hardware Design Guide for Fan Application
    1. 3.1 MCF8315 Power Part Design
    2. 3.2 MCF8315 Function Part Design
    3. 3.3 MCF8315 Communication and Output Part Design
    4. 3.4 MCF8315 Schematic Design Reference
    5. 3.5 MCF8315 Simplifies Peripheral Design
    6. 3.6 MCF8315 Thermal Performance Test
      1. 3.6.1 MCF8315 TSSOP Thermal Test With Inductance Version
  7. 4Summary
  8. 5References

3.3 MCF8315 Communication and Output Part Design

MCF8315 uses the standard I2C protocol for register communication and reading and writing. The pull-up resistor can be reserved through the burner end, and the corresponding test solder joint can be reserved for the on-board circuit.

Table 3-4 MCF8315 Communication snd Output Part Design
PinDescription
SCL/SDA

The recommendation is to use a 5.1kΩ pull-up resistor

SLEW_RATE_I2C_PINS can also be adjusted according to the parasitic capacitance on the actual PCB board

0h = 4.8mA (default)

1h = 3.9mA

2h = 1.86mA

3h = 30.8mA

OUTA/B/CNo external current detection resistor is required