DRV201A ADDRESS

0

0

0

1

1

1

0

0

REGISTER NUMBER

M

DATA

CURRENT REGISTER NUMBER K

REGISTER NUMBER M

DATA

REGISTER NUMBER M+1

M+2

DATA

REGISTER NUMBER M+L-1

M+L

L bytes of DATA

DRV201A ADDRESS

0

0

0

1

1

1

0

1

DATA

REGISTER NUMBER M

REGISTER NUMBER M+1

K+2

DATA

DATA

L bytes of DATA

REGISTER NUMBER M+L-1

M+L

DRV201A ADDRESS

0

0

0

1

1

1

0

0

REGISTER NUMBER

M

CURRENT REGISTER NUMBER K

0

0

0

1

1

1

0

1

DATA

0

0

0

1

1

1

0

1

DATA

CURRENT REGISTER NUMBER K

REGISTER NUMBER K+1

K+2

DRV201A ADDRESS

DRV201A ADDRESS

0

0

0

1

1

1

0

0

REGISTER NUMBER

M

0

0

0

1

1

1

0

1

DATA

CURRENT REGISTER NUMBER K

REGISTER NUMBER M

M+1

DRV201A ADDRESS

DRV201A ADDRESS

DRV201A

www.ti.com

SLVSBN6A – JUNE 2013 – REVISED AUGUST 2015

Programming (continued)

Figure 7. Single Read From A Defined Location

Figure 8 shows the single read from the current location. If the read command is issued without defining the

register number first, DRV201A writes out the data from the current register from the device memory.

Figure 8. Single Read From The Current Location

7.5.1.3 Sequential Read and Write

Sequential read and write allows simple and fast access to DRV201A registers. Figure 9 shows sequential read

from a defined location. If the master doesn’t issue a stop condition after giving ACK, DRV201A auto increments

the register number and writes the data from the next register.

Figure 9. Sequential Read From A Defined Location

Figure 10 shows the sequential write. If the master doesn’t issue a stop condition after giving ACK, DRV201A

auto increments it’s register by one and the master can write to the next register.

Figure 10. Sequential Write

If read is started without writing the register value first, DRV201A writes out data from the current location. If the

master doesn’t issue a stop condition after giving ACK, DRV201A auto increments the I2C register and writes out

the data. This continues until the master issues a stop condition. This is shown in Figure 11.

Copyright © 2013–2015, Texas Instruments Incorporated

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