TMC423

TMC423 Data Sheet – (V1.13 / June 20th, 2007) 1/22 TMC 423 – Datasheet Serial Triple Incremental Encoder Interface TCK SDO SDI SCK NSCS SDO428 NSCS428 NINT PRA/IO GND VCCA NC CLK EXT_RES VCCI TRINAMIC Motion Control GmbH & Co. KG Sternstrasse 67 D – 20357 Hamburg GERMANY WWW.TRINAMIC.COM GND TDI ENC1_A ENC1_B ENC1_N ENC2_A TMS VCCI GND ENC2_B ENC2_N ENC3_A ENC3_B ENC3_N STEP1 TRST DIR1 VCCI STEP2 DIR2 STEP3 DIR3 TMC423 TQFP-100 Package COLUMN_PIN(0) COLUMN_PIN(1) COLUMN_PIN(2) COLUMN_PIN(3) GND VKS (GND) VPP (VCCA) SW_ROW_PIN(0) SW_ROW_PIN(1) SW_ROW_PIN(2) SW_ROW_PIN(3) SW_ROW_PIN(4) SW_ROW_PIN(5) LED_ROW_PIN(0) VCCI VSV (VCCA) LED_ROW_PIN(1) LED_ROW_PIN(2) LED_ROW_PIN(3) LED_ROW_PIN(4) LED_ROW_PIN(5) GND SDO_D SDI_D SCK_D NSCS_D PRB/IO VCCA GND NC GND REF(0) REF(1) REF(2) STOPR(0) VCCI STOPR(1) STOPR(2) STOPL(0) STOPL(1) TDO STOPL(2) TMC423 Main Features The TMC423 is a triple incremental encoder input chip, which interfaces to any SPITM compatible controller. The TMC423 can especially be used in conjunction with the TMC428 triple stepper motor controller to provide position verification or stabilization using some additional software. It integrates 24 bit counters for each encoder to provide a high position resolution without CPU interaction. Further it allows dynamic resolution adaptation to allow direct comparison of encoder counters with motors using different micro step resolution. All encoder counters can be latched synchronously, or whenever a null channel eve...