Datasheet TMC7300 (TRINAMIC) - 7

TMC7300 DATASHEET (Rev. 1.01 / 2019-NOV-06) 7
2 Pin Assignments
The TMC7300 comes in a tiny package in order to fit miniaturized devices. For the ease of use, pinning is shown separately for all four function-modes.
2.1 Package Outline TMC7300 (UART mode)
A 1 1 B R R B OA VS OB B 20 19 18 17 16 OA2 1 15 OB2 VCP 2 14 GND A1 3 TMC7300 13 1.8VOUT (DC motor) A2 4 © B. Dwersteg, 12 DIAG 5 TRINAMIC B1_AD0 PAD 11 VIO/NSTDBY 6 7 8 9 10 1 T E T D EN R R A A OD A _ U 2 M U N _ B E M WP
Figure 2.1 TMC7300 Pinning Top View Stepper Driver – QFN20, 3x3mm², 0.4mm pitch 2.2 Signal Descriptions / UART mode Pin Number Type Function
OA2 1 DC motor 1 output 2 Charge pump voltage. Optionally tie to VS using 1nF to 100nF VCP 2 capacitor. May be left unconnected in stepper mode. A1 3 DI A1 input not used in UART mode (tie to GND or VCC_IO) A2 4 DI A2 input not used in UART mode (tie to GND or VCC_IO) B1_AD0 5 DI Selection of UART Address 0…3 (AD0=LSB, AD1=MSB) B2_AD1 6 DI Enable input. The power stage becomes switched off (all motor EN 7 DI outputs floating) when this pin becomes driven to a low level. Also used to clear error flags. Mode selection input. ENUART 8 DI ENUART, MODE: 01: 4 Halfbridge 10: UART enabled MODE 9 DI (CLK, TST input in factory test mode) PWM_UART 10 DIO UART Input/Output. 1.8V to 5V IO supply voltage for all digital pins. IC goes to standby VIO/NSTDBY 11 mode and resets, when this pin is pulled to GND. Diagnostic output. High level upon driver error or stall. Reset by DIAG 12 DO EN=low. Output of internal 1.8V regulator. Attach 100nF ceramic capacitor to 1.8VOUT 13 GND near to pin for best performance. Provide the shortest possible loop to the GND pad. GND 14 GND. Connect to GND plane near pin. OB2 15 DC motor 2 output 2 Sense resistor connection for coil B or DC motor 2. Place sense BRB 16 resistor to GND near pin. OB1 17 DC motor 2 output 1 www.trinamic.com