Datasheet

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1.4V
1.4V
50%ofV
DD
CS
t
(MSH)
t
(MDH)
t
(MDS)
MC
MDI
LSB
T0013-09
t
(MOS)
MDO
1.4V
t
(MSS)
t
w(MHH)
t
w(MCL)
t
w(MCH)
t
(MCY)
MODE CONTROL REGISTERS
User-Programmable Mode Controls
Register Map
PCM1738
SBAS174C – FEBRUARY 2002 – REVISED FEBRUARY 2007
PARAMETER MIN MAX UNIT
t
(MCY)
MC clock cycle time 100 ns
t
w(MCL)
MC low-level time 40 ns
t
w(MCH)
MC high-level time 40 ns
t
(MHH)
CS high-level time 80 ns
t
(MSS)
CS falling edge to MC rising edge 15 ns
t
(MSH)
CS hold time
(1)
15 ns
t
(MDH)
MDI hold time 15 ns
t
(MDS)
MDI setup time 15 ns
t
(MOS)
MC falling edge to MDO stable 30 ns
(1) MC rising edge for LSB to CS rising edge
Figure 38. Control Interface Timing
The PCM1738 includes a number of user- programmable functions that are accessed via mode control registers.
The registers are programmed using the serial control interface that was previously discussed in this data sheet.
Table 3 lists the available mode control functions, along with their reset default conditions and associated
register index.
The mode control register map is shown in Table 4 . Each register includes a W/R bit that indicates whether a
register read (W/R = 1) or write (W/R = 0) operation is performed.
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