CS43L43

DS479PP3

13

To write to the device, follow the procedure below while adhering to the control port Switching Spec-

ifications in section 6.

of the address byte is the R/W bit.

2) Wait for an acknowledge (ACK) from the part, then write to the memory address pointer, MAP.

This byte points to the register to be written.

3) Wait for an acknowledge (ACK) from the part, then write the desired data to the register pointed

to by the MAP.

4) If the INCR bit (see section 3.8.2) is set to 1, repeat the previous step until all the desired registers

are written, then initiate a STOP condition to the bus.

initiate a repeated START condition and follow the procedure detailed from step 1. If no further

writes to other registers are desired, initiate a STOP condition to the bus.

To read from the device, follow the procedure below while adhering to the control port Switching

Specifications.

of the address byte is the R/W bit.

2) After transmitting an acknowledge (ACK), the device will then transmit the contents of the regis-

ter pointed to by the MAP. The MAP will contain the address of the last register written to the MAP,

3) Once the device has transmitted the contents of the register pointed to by the MAP, issue an ACK.

4) If the INCR bit is set to 1, the device will continue to transmit the contents of successive registers.

Continue providing a clock and issue an ACK after each byte until all the desired registers are read,

then initiate a STOP condition to the bus.

initiate a repeated START condition and follow the procedure detailed from step 1. If no further reads

from other registers are desired, initiate a STOP condition to the bus.

SD A

SC L

00 100 0

R/W

Sta r t

AC K

DA T A

1- 8

ACK

DAT A

1- 8

AC K

Sto p

NO T E

0

N O T E : If op er atio n is a w r ite , th is by te c onta ins the M e m o r y A ddr e s s P o in te r , M A P . If

ope r a tion is a r e a d , th is by te c o n tains th e data of th e r egis ter po in ted to by th e M A P .

Figure 8. Control Port Timing