參數(shù)資料
型號(hào)： S1C6N3B0D0A0100
元件分類： 微控制器/微處理器
英文描述： MICROCONTROLLER, UUC54
封裝： DIE-54
文件頁(yè)數(shù)： 58/79頁(yè)
文件大小： 606K
代理商： S1C6N3B0D0A0100
S1C6N3B0 TECHNICAL MANUAL
EPSON
53
CHAPTER 4: PERIPHERAL CIARCUITS AND OPERATION (Heavy Load Protection Circuit)
4.10 Heavy Load Protection Circuit (S1C6N3B0)
4.10.1 Heavy load protection function
The S1C6N3B0 has a heavy load protection function for when the battery load becomes heavy and the
source voltage changes, such as when an external buzzer sounds or an external lamp lights. The state
where the heavy load protection function is in effect is called the heavy load protection mode. Compared
with the normal operation mode, the IC can operate in low voltage.
The heavy load protection function allows the S1C6N3B0 to operate with 0.8 V supply voltage.
This function is not available in the S1C6A3B0.
The normal mode changes to the heavy load protection mode in the following case:
When the software changes the mode to the heavy load protection mode (HLMOD = "1")
In the heavy load protection mode, the internal regulated voltage for the internal circuits is generated
from the LCD system booster voltage VC2. Consequently, more current is consumed in the heavy load
protection mode than in the normal mode. Unless it is necessary, be careful not to set the heavy load
protection mode with the software.
At initial reset, the S1C6N3B0 is set in the heavy load protection mode to be certain oscillation starts.
Return to the normal mode by writing "0" to the HLMOD register after stabilizing oscillation.
4.10.2 Control of heavy load protection circuit
Table 4.10.2.1 shows the heavy load protection circuit control bit and the address.
Table 4.10.2.1 I/O memory (Heavy load protection circuit)
Address
Comment
D3
D2
Register
D1
D0
Name
Init 1
10
0FAH
HLMOD
0
R/W
R
HLMOD
0 3
1
0
– 2
Heavy
–
Normal
–
Heavy load protection mode (S1C6N3B0)
Fixed at "0" in the S1C6A3B0
Unused
1
2
Initial value at initial reset
Not set in the circuit
3
4
Always "0" being read
Reset (0) immediately after being read
HLMOD: Heavy load protection mode on/off (0FAH D3)
Controls the heavy load protection mode.
When "1" is written: Heavy load protection mode on
When "0" is written: Heavy load protection mode off
Reading: Valid
When HLMOD is set to "1", the S1C6N3B0 enters the heavy load protection mode.
In the heavy load protection mode, the consumed current becomes larger. Unless necessary, do not select
the heavy load protection mode with the software.
The heavy load protection function is not available in the S1C6A3B0.
At initial reset, this register is set to "1" (heavy load protection mode) in the S1C6N3B0, and "0" in the
S1C6A3B0.
4.10.3 Programming note
In the heavy load protection mode, the consumed current becomes larger. Unless necessary, do not select
the heavy load protection mode with the software.
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