L6474 datasheet(43/51 Pages) STMICROELECTRONICS

Numer części	L6474

Szczegółowy opis	easySPIN ??fully integrated microstepping motor driver

PDF	51 Pages

Scroll/Zoom	100%

Producent	STMICROELECTRONICS [STMicroelectronics]

Strona internetowa	http://www.st.com

Logo

43 / 51 page

L6474

Programming manual

Doc ID 022529 Rev 2

43/51

Figure 15.

Command with three-byte argument

By default, the device returns an all zeroes response for any received byte, the only

exceptions are GetParam and GetStatus commands. When one of these commands is

received, the following response bytes represent the related register value (see Figure 16).

Response length can vary from 1 to 3 bytes.

Figure 16.

Command with three-byte response

During response transmission, new commands can be sent. If a command requiring a

response is sent before the previous response is completed, the response transmission is

aborted and the new response is loaded into the output communication buffer (see

Figure 17).

Figure 17.

Command response aborted

When a byte that does not correspond to a command is sent to the IC it is ignored and the

WRONG_CMD flag in the STATUS register is raised (see Section 9.1.13).

9.2.2

Nop

Nothing is performed.

Table 31.

Nop command structure

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

From host

L6474 Arkusz danych(PDF) 43 Page - STMicroelectronics