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STA001

Figure 7.

SOFTWARE SPECIFICATION

Interface protocol

The interface protocol comprises:

- A start condition (S)

- A chip address byte

- A two data bytes

- A stop condition (P)

ack = Acknowledge

S = Start

P = Stop

"Byte by byte" option

A "byte by byte" programming mode is also possible when there is no need to use both data bytes to program

the chip (for example during the setup of 2nd PLL).

To use this feature remember that first bit of both data bytes is reserved to chose the destination of the remaining

7 bits.

ack = Acknowledge

S = Start

Symbol

Parameter

Maximum time (ns)

Ack begin delay

200

Ack end delay

200

MSB

chip address

LSB

MSB

1st data byte

LSB

MSB

2nd data byte

LSB

S

1

1

000000 ack 1 D6D5D4D3 D2 D1D0 ack 0 D6D5D4D3D2 D1 D0 ack

P

MSB

chip address

LSB

MSB

1st data byte

LSB

S

1

100

00

00

ack

K

D6D5D4D3

D2

D1D0

ack

P

SDA

SCL

td2

89

td1