L6480 datasheet(61/73 Pages) STMICROELECTRONICS

tên linh kiện	L6480

Giải thích chi tiết về linh kiện	The L6480, realized in analog mixed signal technology, is an advanced fully integrated solution suitable for driving two-phase bipolar stepper motors with microstepping.

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61 / 73 page

L6480

Programming manual

Doc ID 023278 Rev 3

61/73

9.2.1

Command management

The host microcontroller can control motor motion and configure the L6480 through a

complete set of commands.

All commands are composed by a single byte. After the command byte, some bytes of

arguments should be needed (see Figure 21). Argument length can vary from 1 to 3 bytes.

Figure 21.

Command with 3-byte argument

By default, the device returns an all zero 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 22). Response

length can vary from 1 to 3 bytes.

Figure 22.

Command with 3-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 23).

Figure 23.

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 paragraph Section 9.1.24).

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