10.1.4. Single-byte read

During a single-byte read, only one register is read. After the device address is transmitted, the master has to transmit the register ad -

dress. After addressing the epc901 IC with a read-command, it transmits the read data. The access is terminated with a NACK and a

STOP by the master.

P

A

S 0 0 1

1

Read data

N

A

S 0 0 1

0

Register address

A

Device address

Device address

10.1.5. Multi-byte read

During a multi-byte read operation the master transmits the device address and the address of the first register to be read. Afterwards, the

epc901 is addressed with a read command. It then transmits data bytes until the master applies NACK and a STOP.

S

P

Read data 0

A

Read data 1

A

Read data n

N

A

0 0 1

1

Register address

S

A

A

0 0 1

0

Device address

Device address

Registers reside in a non-consecutive address space. Reading to a unused address will return no useful data.

10.1.6. Software reset

P

A

S 0 0

A

0 0 0 0 0 0

0 0 0 0 0 1 1 0

A software reset has the same effect like a power-up reset. E.g. the chip uses the configuration as given by the configuration pins. Also, all

trimming parameters are reset to the initial values.

10.1.7. Re-sampling the device address

P

A

S 0 0

A

0 0 0 0 0 0

0 0 0 0 0 1 0 0

By applying this command, the pins CS0 and CS1 are read and updated in the internal address register.

10.2. Setup latency

The new register value becomes active with the falling edge of the last bit transmitted.

© 2016 ESPROS Photonics Corporation

Characteristics subject to change without notice

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