MAX1454_11 Datasheet, PDF (20/25 Pages) Maxim Integrated Products – Precision Sensor Signal Conditioner with Overvoltage Protection

MAX1454
Precision Sensor Signal Conditioner
with Overvoltage Protection
POWER-ON
POWER-ON RESET LOADS VALUES
FROM FLASH MEMORY.
SERIAL COMMUNICATION READY
AFTER 2ms
NO
YES
CTRLREP = 0x7?
NO
SET DIGITAL MODE TIMEOUT
COUNTER AND CONTROL WORD
REPETITION COUNTER BASED ON
PWRUPCFG REGISTER SETTING
INITIALIZATION
NO
BYTE RECEIVED?
YES
SYNCHRONIZE BAUD RATE FROM
INITIALIZATION BYTE
INITIALIZATION
NO
BYTE RECEIVED?
YES
SYNCHRONIZE BAUD RATE FROM
INITIALIZATION BYTE
DECREMENT DIGITAL MODE ^NO
TIMEOUT COUNTER
RESET DIGITAL MODE TIMEOUT
COUNTER BASED ON
DIGMODETIME SETTING
CONTROL WORD
NO
RECEIVED? (0xAD)
YES
DECREMENT CONTROL WORD
REPETITION COUNTER
DECREMENT DIGITAL MODE ^NO
TIMEOUT COUNTER
NO
REPETITION
COUNTER = 0?
YES
DEVICE ENTERS DIGITAL
PROGRAMMING MODE
NO
TIMEOUT
YES
COUNTER = 0?
NO
TIMEOUT
YES
COUNTER = 0?
EXECUTE COMMAND
COMMAND BYTE
NO
RECEIVED?
YES
NO
COMMAND
YES
DEVICE ENTERS FIXED
BYTE = 0x89?
ANALOG MODE
Figure 4. Power-Up Flow Chart
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