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AS8520

Preliminary Data Sheet - D e t a i l e d D e s c r i p t i o n

7.3 State Diagram

The complete functional state machine for AS8520 is illustrated in Figure 6. Some soft-states in the FSM like “TXWD Wait”, “Standby Wait” and

other “wait” states have been included for the sake of completeness.

Figure 6. Finite State Machine Model for the AS8520 System

RESET

TIMEOUT

OTP LOAD

INIT0

NORMAL

WAIT_TEST

WAIT_OTP

OVTEMP

Temp Shut

SLEEP

STANDBY

por_vsup

otp_load

RX=0

test_en

otp_e

n

temp160

temp160

temp160

! temp160

stan

dby

Standby &

sleep

128msec

rwake

! por_vcc

reset

timeout

Tem

p

shutd

own

! por_vcc ||

wwdtimeout

STANDBY

WAIT

temp160

! sta

ndb

y

TXWD WAIT

temp160

temp160

! por_vcc

RX=0

temp160

! por_vcc ||

wwdtimeout