S3F80JB

RESET

 

 

If "Vreset > VIH", the operating status is in STOP mode and IPOR / LVD control bit of smart option is '0', LVD circuit is disabled in the S3F80JB.

VDD

VLVD

0.4VDD

a

 

0.85VDD

 

b

Va

 

 

 

 

b

 

 

Reset Pulse Width

NOTE: Va is a schmitt trigger input signal of internal power-on reset (IPOR).

a. System reset is not occurred.

b. System reset is occurred by internal POR circuit.

Figure 8-6. Reset Timing Diagram for The S3F80JB in STOP mode by IPOR

EXTERNAL INTERRUPT RESET

When IPOR/LVD Control Bit (smart option bit [7] @ 03FH) is set to ‘0’and chip is in stop mode, if external interrupt is occurred by among the enabled external interrupt sources, from INT0 to INT9, reset signal is generated.

8-7

Page 225
Image 225
Samsung manual Reset Timing Diagram for The S3F80JB in Stop mode by Ipor, External Interrupt Reset