MSM80C154S/83C154S/85C154HVS

 

F/F1

F/F2

 

TIMER0, 1

 

VCC

D

Q

D

Q

 

C

 

 

 

 

 

F/F1

F/F2

 

 

 

T0 or T1

 

R

L

 

 

S Q

PDRESET

 

 

 

 

 

 

 

 

S5

 

S3

RESET

R

 

RESET

 

 

 

 

 

TF0 or 1

 

PD

 

 

 

 

PCON5(RPD)

 

 

 

 

 

 

 

Figure 4-59 TIMER0, 1 power down cancellation circuit

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Sonic Alert msm85c154hvs, msm83c154s, msm80154s user manual TIMER0