DRV8860_16 Datasheet, PDF (16/41 Pages) Texas Instruments – 8-Channel Serial Interface Low-Side Driver

DRV8860, DRV8860A
SLRS065E – SEPTEMBER 2013 – REVISED NOVEMBER 2015
www.ti.com
8.5 Programming
8.5.1 Serial Control Interface
DRV8860 is using a daisy chain serial interface. Data is latched into the register on the rising edge of the LATCH
pin. Data is clocked in on the rising edge of CLK when writing, and data is clocked out on the falling edge of CLK
when reading.
8.5.1.1 Data Writing Waveform
LATCH
CLK_xxxxxxxxxxxx 1
2
3
4
5
6
7
8
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
DIN_xxxxxxxxxxA_D8 A_D7 A_D6 A_D5 A_D4 A_D3 A_D2 A_D1 _{xxxxxxxxxxxxxxxxxxxxxxxx}
Data Registe_xxxr _{xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx}Ol_xxxd D_xxxa_xxxta_xxxR_xxxeg_xxxist_xxxer_xxxC_xxxon_xxxten_xxxts_{xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx} Data A
Figure 11. Writing Data Register – Single Device
LATCH
xx xxxx _CLK
xx xxxx _DIN1
xxx xxxx _DOUT1/DIN2
xxxxxxxxxxxx xxxx _{DataRegister1}
x_xxx_xxx_xxx_xxx_xxx_xxx_xxx_xxx_xxx_xxx_xxx_xxx_xxx_xxx_xxx_xxx_xxx_xxx_xxx_xxx_{xx Data Register 2}
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16
A_D8 A_D7 A_D6 A_D5 A_D4 A_D3 A_D2 A_D1 B_D8 B_D7 B_D6 B_D5 B_D4 B_D3 B_D2 B_D1
A_D8 A_D7 A_D6 A_D5 A_D4 A_D3 A_D2 A_D1
Old Data Register Contents ± Device #1
Old Data Register Contents ± Device #2
Figure 12. Writing Data Register – Daisy Chan
Data B
Data A
Figure 13. Writing Data Register – Data Flow
16
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