l99dz80ep STMicroelectronics, l99dz80ep Datasheet - Page 46

• Manufacturer Part Number: l99dz80ep
• Description: Door Actuator Driver
• Manufacturer: STMicroelectronics

Functional description of the SPI
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This 8-bit register indicates the SPI frame length (24 bit) and the availability of additional
features. Each communication frame consists of a command byte, which is followed by two
data bytes.
The data returned on DO within the same frame always starts with the <Global Status>
Byte. It provides general status information about the device. It is followed by two data bytes
(i. e. ‘In-frame-response’).
For write cycles the <Global Status> Byte is followed by the previous content of the
addressed register.
Figure 22. Write and read SPI
Doc ID 18260 Rev 4
L99DZ80EP