8.14.4 Synchronous Serial Interface (SSI) Characteristics
8.14.4.1 Synchronous Serial Interface (SSI) Characteristics
over operating free-air temperature range (unless otherwise noted)
PARAMETER
NO.
PARAMETER
MIN
TYP
MAX
UNIT
S1
t
clk_per
SSIClk cycle time
12
65024
System Clocks
S2
t
clk_high
SSIClk high time
0.5
t
clk_per
S3
t
clk_low
SSIClk low time
0.5
t
clk_per
(1)
Refer to SSI timing diagrams
(2)
When using the TI-provided Power driver, the SSI system clock is always 48 MHz.
SSIClk
SSIFss
SSITx
SSIRx
MSB
LSB
S2
S3
S1
4 to 16 bits
Figure 8-1. SSI Timing for TI Frame Format (FRF = 01), Single Transfer Timing Measurement
0
SSIClk
SSIFss
SSITx
SSIRx
MSB
LSB
MSB
LSB
S2
S3
S1
8-bit control
4 to 16 bits output data
Figure 8-2. SSI Timing for MICROWIRE Frame Format (FRF = 10), Single Transfer
SWRS232D – FEBRUARY 2019 – REVISED FEBRUARY 2021
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