Serial Programming Interface (PCM2705/7)
t
(MCH)
50% of V
DD
MS
t
(MLS)
LSB
50% of V
DD
50% of V
DD
t
(MCL)
t
(MHH)
t
(MLH)
t
(MCY)
t
(MDH)
t
(MDS)
MC
MD
T0013-04
MC
MS
MD
16 Bits
(1) Single Write Operation
MSB
LSB
MSB
(2) Continuous Write Operation
MSB
LSB
MSB
LSB
MSB
LSB
16 Bits
y
N Frames
MC
MS
MD
N Frames
T0012-02
,,
SLES081F – JUNE 2003 – REVISED JANUARY 2009
.......................................................................................................................................................
www.ti.com
The PCM2705/7 supports the serial programming interface (SPI) to program the descriptor and to set the HID
state. Descriptor data are described in the
External ROM Descriptor
section.
SYMBOL
PARAMETER
MIN
TYP
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 27. SPI Timing Diagram
Figure 28. SPI Write Operation
24
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