MLX90601C Datasheet, PDF (5/12 Pages) List of Unclassifed Manufacturers – SPI IR thermometer module

Datasheet MLX90601C
SPI IR thermometer module
Every write command starts with a high to low
transition of CS and ends by a low to high
transition of CS after 32 periods of the serial
data clock (SCLK). MLX90313C reads the data
present on SDI on the rising edge of the clock.
With a delay of 8 periods of the serial clock, the
SPI will repeat the opcode, address and the first
8 bits of data on pin SDO. This allows the
external master to check command and address
and terminate the operation in case of an error
by forcing CS high before the end of the
complete command cycle, i.e. before the end of
the 32 clock periods.
The read command is build up similarly, except
that no data has to be passed of course. On
SDO the opcode will be followed directly by the
requested data, the address is not returned in
this case.
The data on SDO is valid on the rising edge of
the clock. In case of a read command, the SPI
will output the data on SDO starting on the 25^th
rising edge of the clock (after CS low) as
indicated in the figure above.
Timing/speed
The baud-rate depends on the serial data clock
(SCLK) supplied by the master controller and is
limited to 125kb/s. The timing requirements are
given in the figure and table below
tcls
CS
SCLK
tsu
SDI
SDO
tsclk
thd
SPI timing requirements
Symbol Parameter
Value
Unit
tsclk Sclk period
min 8
µs
tcls
CS low to SCLK high min 50
ns
tsch
SCLK low to CS high min 50
ns
tsu
data in setup time
min 200
ns
thd
data in hold time
min 200
ns
tdv
data out valid
min 1
µs
operation codes
The operation code is the first series of 8bits in a
command, C[7:0] in the figure on the protocol
above.
tsch
tdv
Below table summarizes the operations
available in MLX90313C.
mnem.
WR
RD
WEPR
ER
REPR
BLWR
BLER
Operation Codes
C[7:0]
Command
X101X0XX
Write internal register
X10010XX
Read internal register
0001XXXX
Write EEprom
001XXXXX
Erase EEprom
X0001XXX
Read EEprom
1001XXXX
Block Write EEprom
101XXXXX
Block erase EEprom
Additional information on the SPI and use can
be found in the application note on SPI.
390109060103
Rev. 004
Page 5 of 12
Dec/01