Samsung S3F80JB manual Timing Diagram for Internal Power-On Reset Circuit

Models: S3F80JB

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RESET

S3F80JB

 

 

Voltage [V]

TVDD

= 1ms

 

(VDD Rising Time)

VDD

 

VDD

 

 

Va

 

 

VIH = 0.85 VDD

 

 

VIL = 0.4 VDD

 

Reset Pulse Width

 

 

Reset pulse

 

 

Time

Figure 8-5. Timing Diagram for Internal Power-On Reset Circuit

NOTE

The system reset operation depends on the interlocking work of the reset pin, LVD circuit and Internal POR. The LVD circuit can be disabled and enabled in the stop mode by smart option. If 3FH.7 is ‘1’, LVD circuit is always enabled. In this case the system reset by LVD circuit occurs in stop mode. But, if 3FH.7 is ‘0’, the system reset by LVD circuit doesn’t occur in stop mode. Refer to page 2-3 relating to the smart option. The rising time of VDD must be less than 1ms. If not, IPOR can’t detect power on reset.

8-6

Page 224
Image 224
Samsung S3F80JB manual Timing Diagram for Internal Power-On Reset Circuit