LTC5599IUFPBF View Datasheet(PDF) - Linear Technology
Part Name
Description
MFG CO.
'LTC5599IUFPBF' PDF : 42 Pages View PDF
LTC5599
Applications Information
Multiple Byte Transfers
More efficient data transfer of multiple bytes is accom-
plished by using the LTC5599’s register address auto-
increment feature as shown in Figure 11. The serial port
master sends the destination register address in the first
byte and its data in the second byte as before, but continues
sending bytes destined for subsequent registers. Byte 1’s
address is Addr0+1, Byte 2’s address is Addr0+2, and so
on. If the resister address pointer attempts to increment
past 31 (0x1F), it is automatically reset to 0.
An example of an auto-increment read from the part is
shown in Figure 12. The first byte of the burst sent from
the serial bus master on SDI contains the destination reg-
ister address (Addr0) and an LSB of 1 indicating a read.
Once the LTC5599 detects a read burst, it takes SDO out
of the Hi-Z condition and sends data bytes sequentially,
beginning with data from register Addr0. The part ignores
all other data on SDI until the end of the burst.
Multidrop Configuration
Several LTC5599s may share the serial bus. In this
multidrop configuration, SCLK, SDI, and SDO are common
between all parts. The serial bus master must use a separate
CSB for each LTC5599 and ensure that only one device has
CSB asserted at any time. It is recommended to attach a
high value resistor to SDO to ensure the line returns to a
known level (VCC_L) during Hi-Z states.
Serial Port Registers
The memory map of the LTC5599 may be found in the
Appendix in Table 10, with detailed bit descriptions found
in Table 11. The register address shown in hexadecimal
format under the ADDR column is used to specify each
register. Each register is denoted as either read-only (R)
or read-write (R/W). The register’s default value on device
power-up or after a reset (bit 3, register 0x08, SRESET)
is shown at the right.
MASTER–CSB
MASTER–SDI
ADDR0 + WR
BYTE 0
BYTE 1
BYTE 2
LTC5599–SDO
5599 F11
Figure 11. Serial Port Auto-Increment Write
MASTER–CSB
MASTER–SDI
LTC5599–SDO
ADDR0 + RD
DON’T CARE
BYTE 0
BYTE 1
BYTE 2
5599 F12
Figure 12. Serial Port Auto-Increment Read
5599f
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For more information www.linear.com/LTC5599
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