LMP90077MHENOPB National Semiconductor, LMP90077MHENOPB Datasheet - Page 36

• Manufacturer Part Number: LMP90077MHENOPB
• Description: IC AFE 16BIT 214.6SPS 28-TSSOP
• Manufacturer: National Semiconductor
• Series: -r

Specifications of LMP90077MHENOPB

• Number Of Bits: 16
• Number Of Channels: 2 Differential, 4 Single-Ended
• Power (watts): -
• Voltage - Supply, Analog: 2.85 V ~ 5.5 V
• Voltage - Supply, Digital: 2.7 V ~ 5.5 V
• Package / Case: 28-TSSOP (0.173", 4.40mm Width)
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: LMP90077MHENOPBTR

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DrdybCase3: Routing DRDYB to D6
The drdyb signal can be routed to pin D6 by setting
SPI_DRDYB_D6 high and SDO_DRDYB_DRIVER to 0x4.
This is the behavior for DrdybCase3 as shown in
The timing protocol for this case can be seen in
Since DRDYB is separated from SDO, it can be monitored
16.5.7 Data Only Read Transaction
In a data only read transaction, one can directly access the
data byte(s) as soon as the CSB is asserted without having
to send any instruction byte. This is useful as it brings down
the latency as well as the overhead associated with the in-
struction byte (as well as the Upper Address Byte, if any).
Enable Data First Mode Instruction
Disable Data First Mode Instruction
Read Mode Status Transaction
FIGURE 25. DrdybCase3 Connection Diagram
FIGURE 26. Timing Protocol for DrdybCase3
TABLE 5. Data First Mode Transactions
Figure
Figure
25.
Bit[7]
1
1
1
26.
36
Bits[6:5]
11
11
00
using the interrupt or polling method. If polled, the drdyb signal
needs to be polled faster than t
sertion. When drdyb asserts, assert CSB to start the SPI
transaction and begin writing the Instruction Bytes (INST1,
UAB, INST2) to read from or write to registers.
In order to use the data only transaction, the device must be
placed in the data first mode. The following table lists trans-
action formats for placing the device in and out of the data first
mode and reading the mode status.
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Bit[4]
1
1
1
Bits[3:0]
1010
1011
1111
DRDYB
to detect a drdyb as-
Data Bytes
None
None
One
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