STMicroelectronics Stepper motor driver mounting the L6474 EVAL6474H EVAL6474H Data Sheet
Product codes
EVAL6474H
EVAL6474H
Board description
Doc ID 022766 Rev 1
3/10
Table 2.
Jumpers and connectors description
Name
Type
Function
J1
Power supply
Motor supply voltage
J5
Power output
Bridge A outputs
J6
Power output
Bridge B outputs
J2
SPI connector
Master SPI
J3
SPI connector
Slave SPI
J4
NM connector
OSCIN and OSCOUT pins
J7
NM connector
SYNC output
TP1 (VS)
Test point
Motor supply voltage test point
TP4 (VDD)
Test point
Logic interface supply voltage test point
TP5 (VREG)
Test point
Logic supply voltage/L6474 internal regulator test
point
point
TP6 (GND)
Test point
Ground test point
TP2 (STCK)
Test point
Step clock input test point
TP8 (DIR)
Test point
DIR output test point
TP3 (STBY/RES)
Test point
STBY/RES input test point
TP7 (FLAG)
Test point
FLAG output test point
Table 3.
Slave SPI connector pinout (J11)
Pin
number
Type
Description
1
Digital input
L6474 direction input
2
Open drain output
L6474 FLAG output
3
Ground
Ground
4
Supply
EXT_VDD (can be used as external logic power supply)
5
Digital output
SPI master IN slave OUT signal (connected to the L6474 SDO
output through daisy chain termination jumper JP2)
output through daisy chain termination jumper JP2)
6
Digital input
SPI serial clock signal (connected to L6474 CK input)
7
Digital input
SPI master OUT slave IN signal (connected to the L6474 SDI
input)
input)
8
Digital input
SPI slave select signal (connected to the L6474 CS input)
9
Digital input
L6474 step-clock input
10
Digital input
L6474 standby/reset input