le79128 Zarlink Semiconductor, le79128 Datasheet - Page 38
le79128
Manufacturer Part Number
le79128
Description
Next Generation Voiceedge™ Control Processor Next Generation Carrier Chipset Ngcc
Manufacturer
Zarlink Semiconductor
Datasheet
1.LE79128.pdf
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SPI Timing Requirements
The timing requirements for read and write accesses are shown in the following timing diagrams. The single data word read and
write command is shown in
command in
information for the read/write command is in
SI/SO
SI/SO
SI/SO
SCK
or
SCK
SCK
SCK
SCK
Figure
or
SS
SS
SCK
SCK
SCK
SO
or
SS
or
SI
SS
20. Bits 7:0 of the data word comes out first and bits 15:8 of the data word come out second. The timing
Figure 18
cmd_wd[15:8]
cmd_wd[15:8]
Figure 18. One Data Word Write in Byte Framing Mode
command word
command word
and
Figure
Figure
Figure 17. SS Framing Modes
19. The data word can have data bytes swapped like the single data word write
Microsemi Corporation - CMPG
cmd_wd[7:0]
21,
cmd_wd[7:0]
Word framing mode
Command framing mode
Byte framing mode
Figure
Le79128
38
22, and
Table
data_wd[15:8]
data_wd[15:8]
data word
18.
data word
data_wd[7:0]
Preliminary Data Sheet
data_wd[7:0]
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