Datasheet

MC
MS
MD
MC
MS
MD
16 Bits
16 Bits FramesN?
N Frames
(2) Continuous Write Operation
(1) Single Write Operation
MSB MSB
MSBMSB
LSB
LSB
MSBLSB LSB
LSB
MS
MC
MD
50% of V
DD
50% of V
DD
50% of V
DD
t
(MLS)
t
(MCH)
t
(MCL)
t
(MCY)
t
(MDS)
t
(MDH)
t
(MLH)
t
(MHH)
PCM2704C, PCM2705C
PCM2706C, PCM2707C
SBFS036A –AUGUST 2011–REVISED JULY 2012 www.ti.com
Serial Programming Interface (PCM2705C/7C)
The PCM2705C/7C supports a serial interface (SPI) to program the descriptor and to set the HID state.
Descriptor data are described in the External ROM Descriptor section. Figure 29 illustrates the SPI timing;
Table 13 lists the respective timing characteristics.
Figure 29. SPI Timing Diagram
Table 13. SPI Timing Characteristics
SYMBOL PARAMETER MIN MAX UNIT
t
(MCY)
MC pulse cycle time 100 ns
t
(MCL)
MC low-level time 50 ns
t
(MCH)
MC high-level time 50 ns
t
(MHH)
MS high-level time 100 ns
t
(MLS)
MS falling edge to MC rising edge 20 ns
t
(MLH)
MS hold time 20 ns
t
(MDH)
MD hold time 15 ns
t
(MDS)
MD setup time 20 ns
Figure 30 shows the SPI write timing sequence.
Figure 30. SPI Write Operation
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Product Folder Link(s): PCM2704C PCM2705C PCM2706C PCM2707C