Siemens S50037 사용자 설명서

                                                 SieMo S50037 Data Book 

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Multi-Slave Operation

SieMo should not be connected in a multi-slave arrangement by simple parallel connection of
slave MISO lines. When SieMo is deselected (SPI_CSB = 1), the SPI_MISO line does not
float. Instead, SieMo outputs 0 if the processor is running or 1 if it is stopped.

Writing to SieMo

To write to the SieMo, the 8-bit write command (00000010) is sent first (C[7:0]  followed by a
16-bit address (A[15:0]). 16 bits of data (D:[15:0]) are sent.

SPI_CSB

CMOS input

Serial Peripheral Interface Chip
Select

E1

2

SPI_CLK

CMOS input

Serial Peripheral Interface SPI
Clock

E2

9

SPI_MOSI

CMOS input

Serial Peripheral Interface SPI
Data Input

E3

8

SPI_MISO

CMOS output Serial Peripheral Interface SPI

Data Output

E4

10

GND

B3

19

SPI Timing

figure 22  SPI write operation a

figure 23 SPI write operation b