LC898240_16 Datasheet, PDF (20/23 Pages) ON Semiconductor – High Efficient Stepper Motor Controller

SERIAL INTERFACE (SPI)
LC898240
LC898240 has the main chip registers and the
non-volatile memory (E2PROM). They can be
accessed through a serial interface (SPI).
During E2PROM data down load to the main chip
registers, the only status register STS can be read.
During acceleration operation, the only main chip
registers can be access (write/read).
Regarding E3PROM access, refer to the E2PROM
datasheet.
Write/Read Sequence
Main Chip Register Write
CSB
SCK
SI
12h (8bit)
SO
Hi-Z
Main Chip Register Read
CSB
Address (16bit)
Data (8bit)
Hi-Z: pulled-down by resistor
Hi-Z
SCK
SI
13h (8bit)
SO
Hi-Z
Address (16bit)
Hi-Z: pulled-down by resistor
Data (8bit)
Hi-Z
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