L9942 datasheet(30/40 Pages) STMICROELECTRONICS

部件名	L9942

功能描述	Integrated stepper motor driver for bipolar stepper motors with microstepping and programmable current profile

PDF	40 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

30 / 40 page

Logic with SPI - electrical characteristics

L9942

30/40

Doc ID 11778 Rev 7

6.6

STEP timing

Figure 10.

Transfer timing diagram

Figure 11.

Input timing

Table 26.

STEP timing

Symbol

Parameter

Test condition

Min.

Typ.

Max.

Unit

tSTEPmin

(1)

STEP low or high time

µs

Parameter guaranteed by design.

time

CSN high to low: DO enabled

actual data

DI: data will be accepted on the rising edge of CLK signal

new data

CSN

CLK

Control and Status Register

DO: data will change on the falling edge of CLK signal

status information

fault bit

CSN low to high: actual data is

transfered to registers

old data

10 11

012

14 15

actual data

A1 A0 D12 D11 D10 D9 D8 D7 D6

D5 D4

D3 D2

D1 D0

D12 D11 D10 D9 D8 D7 D6

D5 D4 D3 D2

D1 D0

CSN_HI,min

fault bit

0.8 VCC

0.2 VCC

Valid

CSN

CLK

set CSN

CLKH

set CLK

CL KL

hold DI

set DI

CLK

L9942 数据表(PDF) 30 Page - STMicroelectronics

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