GV7704 Datasheet, PDF (34/52 Pages) Semtech Corporation – Quad HD-VLC Receiver

Table 4-12: GSPI Timing Parameters (Continued)
Parameter
Symbol
Min
Typ
CS HIGH time
t₉
57.0
—
SDIN to SDOUT combinational
delay
—
—
Max
—
5.0
Units
ns
ns
4.9.8 Single Read/Write Access
Single read/write access timing for the GSPI interface is shown in Figure 4-15 and
Figure 4-16.
When performing a single read or write access, one Data Word is read from/written to
the device per access. Each access is a minimum of 48-bits long, consisting of a
Command Word, an Extended Address, and a single Data Word. The read or write cycle
begins with a high-to-low transition of the CS pin. The read or write access is terminated
by a low-to-high transition of the CS pin.
The maximum interface clock frequency (SCLK) is 55MHz and the inter-command delay
time indicated in the figures as t_cmd, is a minimum of 162ns.
For read access, the time from the last bit of the Command Word to the start of the data
output, as defined by t₅, corresponds to no less than 162ns.
t_CMD
SCLK
CS
SDIN
COMMAND [31:16]
COMMAND [15:0]
DATA [15:0]
X
COMMAND [31:16]
SDOUT
COMMAND [31:16]
COMMAND [15:0]
DATA [15:0]
X
COMMAND [31:16]
Figure 4-15: GSPI Write Timing – Single Write Access
SCLK
t₅
CS
SDIN
COMMAND [31:16]
COMMAND [15:0]
SDOUT
COMMAND [31:16]
COMMAND [15:0]
Figure 4-16: GSPI Read Timing – Single Read Access
DATA [15:0]
4.9.9 Auto-increment Read/Write Access
Auto-increment read/write access timing for the GSPI interface is shown in Figure 4-17
and Figure 4-18.
Auto-increment mode is enabled by the setting of the AUTOINC bit of the Command
Word.
GV7704
Preliminary Data Sheet Rev.3
PDS-060376
September 2015
www.semtech.com
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