SLAA126B April   2001  – September 2018 MSP430F149 , MSP430F149 , TLC3544 , TLC3544 , TLC3548 , TLC3548

 

  1.   Interfacing the TLC3544 or TLC3548 ADC to the MSP430F149 MCU
    1.     Trademarks
    2. 1 Introduction
    3. 2 TLC3544/48 Evaluation Module
    4. 3 Serial Interface
      1. 3.1 Chip Select (CS)
      2. 3.2 Serial Data Input (SDI)
      3. 3.3 Serial Data Output Pin (SDO)
      4. 3.4 Serial Clock Pin (SCLK)
    5. 4 Control and I/O Pins
      1. 4.1 Conversion Start (CSTART)
      2. 4.2 Frame Sync (FS)
      3. 4.3 End of Conversion/Interrupt (EOC/INT)
      4. 4.4 Device Pinout
    6. 5 ADC Initialization and Operation
      1. 5.1 Initializing the ADC
      2. 5.2 Operating the ADC
      3. 5.3 EOC or INT
    7. 6 MSPF149 Code Example
    8. 7 References

4.4 Device Pinout

Table 2 shows the complete device pin assignments for both the TLC3544 and TLC3548 devices.

Table 2. I/O Pins of the TLC3544/48

3544 3548 Pin Name Description
1 1 SCLK Serial input clock
2 2 FS Frame sync: DSP frame synchronization input, tied to Vcc when not used
3 3 SDI Serial data Input: the 4 most significant bits select test modes, mux channel, and conversion speed
4 4 EOC/INT End of conversion/interrupt: used to indicate the converter is busy, or as an external interrupt source to the host processor
5 5 SDO 3-State serial output of conversion result
6 6 DGND Digital ground reference
7 7 DVDD Digital supply voltage: 2.7 to 5.5 V dc
8 8 CS Chip select: active low
9-12 A0 – A4 Analog inputs of the TLC3544
9-16 A0 – A8 Analog inputs of the TLC3548
13 17 AVDD Analog supply voltage
14 18 AGND Analog ground reference
15 19 REFP Upper reference voltage: 5.0 V maximum
16 20 REFM Lower reference voltage: nominally ground
17 21 BGAP Internal band gap compensation: see data sheet for requirements
18 22 AGND Analog ground reference
19 23 AVDD Analog supply voltage
20 24 CSTART External start of conversion trigger: used for extended sampling mode