AMIS-30421 Datasheet, PDF (39/41 Pages) ON Semiconductor – Micro-Stepping Stepper Motor Bridge Controller

AMIS−30421
Predriver Register 7 (PDRV7)
Predriver Register 7 is located at address 0x10 and can be used to set t₁ (see Figure 11).
Table 39. PREDRIVER REGISTER 7
Address
0x10
Access
Reset
Data
Bit 7
R/W
0
−
Predriver Register 7 (PDRV7)
Bit 6
Bit 5
Bit 4
R/W
R/W
R/W
0
1
0
TOP_t1[2:0]
Bit 3
R/W
0
−
Bit 2
R/W
0
Bit 1
R/W
1
BOT_t1[2:0]
Bit 0
R/W
0
Table 40. PREDRIVER REGISTER 7 PARAMETERS
Parameter
Value
Value
Description
Info
000
375 ns
001
500 ns
010
625 ns
011
750 ns
TOP_t1[2:0]
100
875 ns
Defines the switch on duration t₁ for the external top MOSFET’s.
p13
101
1000 ns
110
1125 ns
111
1250 ns
000
375 ns
001
500 ns
010
625 ns
011
BOT_t1[2 :0]
100
750 ns
875 ns
Defines the switch on duration t₁ for the external bottom
MOSFET’s.
p13
101
1000 ns
110
1125 ns
111
1250 ns
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