ST18AU1_DS View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'ST18AU1_DS' PDF : 87 Pages View PDF
ST18-AU1
4 HOST INTERFACE
The host interface is a fast I2C serial bus interface operated in slave mode. It provides
connection to an external host processor. It receives operating commands, and returns host
requested bitstream information and internal status.
4.1 Host interface registers
HSER: Host serial shift register
This 16-bit shift register is used for serial data input and output. Data is shifted MSB first. It is
not visible from the D950.
HDR: Host data register
This register is used for transfers between the HSER register and the D950.
Figure 4.1 Host interface data exchange, receive mode
HCL
HDA
msb 6 5 4 3 2 1 lsb ack msb 6 5 4 3 2 1 lsb
byte 0
byte 1 .....
HSER
msb
lsb
16-bit
HDR
byte 0
byte 1
(msb)
16-bit
(lsb)
YD
(16-bit words)
HSER
HDA
msb
lsb
HDA
8-bit
HDR
byte 0
‘0’
8-bit
8-bit
(msb)
(lsb)
YD
(8-bit words)
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