sh66l16a SinoWealth Micro-Electronics Corp. Ltd, sh66l16a Datasheet - Page 28

• Manufacturer Part Number: sh66l16a
• Description: 16k 4-bit Low Power Micro-controller With Lcd Driver
• Manufacturer: SinoWealth Micro-Electronics Corp. Ltd

16. Low Voltage Reset (LVR)
The LVR function is to monitor the supply voltage and generate an internal reset in the device.
The LVR function is selected by the code option.
The LVR circuit has the following functions when LVR function is enabled:
LVR flag will always keep ‘1’ when the LVR happens, LVRF will be cleared to ‘0’ by setting the Bit2 - 0 of the system register $1D
as “010B”.
Note:
If the Low Voltage Reset function is disabled by the code option, the LVRF bit will be cleared to “0”, regardless the system reset
result.
17. Bonding Option
System Register $14:
Up to 4 different bonding options are possible for user's needs. The chip's program has 4 different program flows that vary
depending on which bonding option is used. The readable contents of B1 and B0 will differ depending on bonding.
Programming Notes:
To correctly fetch the contents of bonding options in variety applications, it is necessary to insert a dummy read instruction
before the genuine reading from the system register $14.
- Generates a system reset when V
- Cancels the system reset when V
Address
Address
$1D
$14
RAMB
Bit 3
Bit3
X
X
X
X
-
-
-
LVRF
Bit 2
Bit2
O/S
0
1
X
X
X
X
B1 = 1
GND
GND
B1 = 0
B1
B1
DD
DD
Bit 1
Bit1
CS1
> V
B1
≤ V
1
0
1
0
-
-
-
LVR
LVR
B0 = 0
B0 = 0
V
V
B0
B0
Bit 0
Bit0
CS0
DD
DD
B0
0
0
1
1
-
-
-
R/W
R/W
W
R
R
R
R
R
R
R
R
28
PCB
PCB
Bit2: Low voltage reset flag register
No LVR reset
LVR reset has issued
Bit1-0: Bonding option register
Default bonding option
B1 bond to GND
B0 bond to V
B1 bond to GND & B0 bond to V
GND
GND
B1 = 1
B1
B1
B1 = 0
DD
B0 = 1
B0 = 1
Remarks
Remarks
V
V
B0
B0
DD
DD
DD
SH66L16A