L9779WD datasheet(129/170 Pages) STMICROELECTRONICS

поискавой системы для электроныых деталей

L9779WD датащи(PDF) 129 Page - STMicroelectronics

номер детали	L9779WD

подробное описание детали	Multifunction IC for engine management system

PDF	170 Pages

Scroll/Zoom	100%

производитель	STMICROELECTRONICS [STMicroelectronics]

домашняя страница	http://www.st.com

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129 / 170 page

DocID027452 Rev 5

129/170

L9779WD

Functional description

169

Figure 78. Command frame diagram

Data frame

A data frame always starts with a low level bit (data selection bit). The number of the data bit

of the active phase of a data frame NDB is fixed to 30. If the number of the data bit is not

equal to NDB = 30 the frame will be ignored and the error flag (TRANS_L) will be set.

The length of the data frame's passive phase tDPP must be a minimum of 2 * tCL.

Execution of the data frame is finished not later than 16*tCL after the end of active phase.

Table 59. Content of a command frame (transmitted LSB first)

Bit

Description

=’1’: command selection bit

1-6

Command

LSB first!

7-14

Data for the command

LSB first!

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