sh66k31c SinoWealth Micro-Electronics Corp. Ltd, sh66k31c Datasheet - Page 16

• Manufacturer Part Number: sh66k31c
• Description: Mask 4-bit Micro-controller
• Manufacturer: SinoWealth Micro-Electronics Corp. Ltd

10. Low Power Detection (LPD)
The LPD function monitors the supply voltage and applies an internal reset in the micro-controller at battery replacement. If the
applied circuit satisfies the following conditions, the LPD can be incorporated by the software control.
The software enable flag controls LPD circuit on/off.
LPD circuit Operating ambient temperature is T
Functions of LPD Circuit:
The LPD circuit has the following functions:
Generates an internal reset signal when V
Cancels the internal reset signal when V
Stops the oscillator operation and force the CPU to enter into STOP mode when V
As V
then cancel the LPD reset.
LPD Control Register:
Address
$15
DD
≤
V
LPD
LPD3
, the LPD reset will delay about 1ms before being triggered. If V
Bit3
LPD2
Bit2
LPD1
Bit1
DD
DD
> V
≤ V
LPD
A
LPD
LPD0
Bit0
= -20 ℃ to + 70 ℃
.
.
R/W
W
16
LPD Enable Control (LPD3 - 0):
When LPD function enable code option = 0
0101: LPD Enable (Power-on initial)
1010: LPD Disable
When LPD function enable code option = 1
xxxx: LPD Enable
DD
goes back to V
DD
≤ V
LPD
Remarks
.
DD
＞ V
LPD
SH66K31C
, without any delay