Datasheet

MAX1454
Precision Sensor Signal Conditioner
with Overvoltage Protection
20Maxim Integrated
Figure 4. Power-Up Flow Chart
CTRLREP = 0x7?
INITIALIZATION
BYTE RECEIVED?
SET DIGITAL MODE TIMEOUT
COUNTER AND CONTROL WORD
REPETITION COUNTER BASED ON
PWRUPCFG REGISTER SETTING
NO
NO
YES
DECREMENT DIGITAL MODE
TIMEOUT COUNTER
TIMEOUT
COUNTER = 0?
RESET DIGITAL MODE TIMEOUT
COUNTER BASED ON
DIGMODETIME SETTING
DECREMENT DIGITAL MODE
TIMEOUT COUNTER
DEVICE ENTERS DIGITAL
PROGRAMMING MODE
SYNCHRONIZE BAUD RATE FROM
INITIALIZATION BYTE
NO
SYNCHRONIZE BAUD RATE FROM
INITIALIZATION BYTE
DECREMENT CONTROL WORD
REPETITION COUNTER
POWER-ON RESET LOADS VALUES
FROM FLASH MEMORY.
SERIAL COMMUNICATION READY
AFTER 2ms
NO
YES
CONTROL WORD
RECEIVED? (0xAD)
NO
YES
EXECUTE COMMAND
REPETITION
COUNTER = 0?
YES
INITIALIZATION
BYTE RECEIVED?
NO
YES
COMMAND BYTE
RECEIVED?
NO
YES
NO YES
TIMEOUT
COUNTER = 0?
NO
NO
YES
COMMAND
BYTE = 0x89?
DEVICE ENTERS FIXED
ANALOG MODE
YES
POWER-ON
NO
NO