Dual DMOS Full Bridge Motor Driver
With Serial Port Control and Dual Regulators
A3998
13
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
Word 2
D0
Bridge 2 Internal PWM Mode:
0 = Mixed decay mode
1 = Slow decay mode
0
D1
Bridge 2 External PWM Mode (ENB2 chopping):
0 = Fast decay mode
1 = Slow decay mode
0
D2 Bridge 2 Phase 0
D3 Bridge 2 DAC LSB (Current Ratio bit) 0
D4 Bridge 2 DAC Bit 2 (Current Ratio bit) 0
D5 Bridge 2 DAC Bit 3 (Current Ratio bit) 0
D6 Bridge 2 DAC Bit 4 (Current Ratio bit) 0
D7
Bridge 1 Internal PWM Mode:
0 = Mixed decay mode
1 = Slow decay mode
0
D8
Bridge 1 External PWM Mode (ENB1 chopping):
0 = Fast decay mode
1 = Slow decay mode
0
D9 Bridge 1 Phase 0
D10 Bridge 1 DAC LSB (Current Ratio bit) 0
D11 Bridge 1 DAC Bit 2 (Current Ratio bit) 0
D12 Bridge 1 DAC Bit 3 (Current Ratio bit) 0
D13 Bridge 1 DAC Bit 4 (Current Ratio bit) 0
D14 Word Select 0 = 0 –
D15 Word Select 1 = 1 –
Table 1. Configuration Register Bit Map (continued)
Bit # Function Reset (POR) Value
Continued on the next page…
