Manual

3
ATA6830
4575B–BCD–01/03
Pin Description
Pin Symbol Function
1 VBAT1A Battery voltage
2 n.c. Not connected
3 SM1A Connection for stepping motor winding A
4 SRA Sense resistor A connection
5 SM2A Connection for stepping motor winding A
6 n.c. Not connected
7 VBAT2A Battery voltage
8 n.c. Not connected
9 SCI1 Test pin, please connect to ground for EMC reasons
10 SCO1 Test pin, please connect to ground for EMC reasons
11 SCI2 Test pin, please connect to ground for EMC reasons
12 SCO2 Test pin, please connect to ground for EMC reasons
13 TA Test pin, please connect to ground for EMC reasons
14 TTEMP Test pin, please connect to ground for EMC reasons
15 VBAT2B Battery voltage
16 n.c. Not connected
17 SM2B Connection for stepping motor winding B
18 SRB Sense resistor B connection
19 SM1B Connection for stepping motor winding B
20 n.c. Not connected
21 VBAT1B Battery voltage
22 BUS Receives the control instructions via the single wire bus from the controller
23 VDD 5 V supply voltage output
24 VSS Digital signal ground
25 AGND Analog signal ground
26 RSET Reference current setting. Connected externally with a resistor to AGND. The value of the resistor
determines all internal current sources and sinks.
27 COS Oscillator pin, connected externally with a capacitor to AGND. The value of the capacitance determines
the chopper frequency and the baud rate for data reception.
28 n.c. Not connected