STA001 Просмотр технического описания (PDF) - STMicroelectronics

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STA001

RF FRONT-END FOR DIGITAL RADIO

STMicroelectronics 

Figure 7.

SDA

SCL

8

9

STA001

Symbol

td1

td2

td1

td2

Parameter

Ack begin delay

Ack end delay

Maximum time (ns)

200

200

SOFTWARE SPECIFICATION

Interface protocol

The interface protocol comprises:

- A start condition (S)

- A chip address byte

- A two data bytes

- A stop condition (P)

MSB

chip address LSB MSB 1st data byte LSB MSB 2nd data byte

LSB

S 1 1 0 0 0 0 0 0 ack 1 D6 D5 D4 D3 D2 D1 D0 ack 0 D6 D5 D4 D3 D2 D1 D0 ack 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.

MSB

chip address

LSB

MSB

1st data byte

LSB

S 1 1 0 0 0 0 0 0 ack K D6 D5 D4 D3 D2 D1 D0 ack P

ack = Acknowledge

S = Start

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