參數(shù)資料
型號: S-35390A-T8T1
元件分類: 時鐘/數(shù)據(jù)恢復(fù)及定時提取
英文描述: REAL TIME CLOCK, PDSO8
封裝: TSSOP-8
文件頁數(shù): 9/48頁
文件大小: 542K
代理商: S-35390A-T8T1
S1C88816 TECHNICAL MANUAL
EPSON
9
2 POWER SUPPLY
2.3 Heavy Load Protection Mode
The S1C88816 has a heavy load protection function
for stable operation even when the supply voltage
fluctuates by driving a heavy load. The heavy load
protection mode becomes valid when the periph-
eral circuits are in the following status:
(1) When the OSC3 oscillation circuit is ON
(OSCC = "1" and not in SLEEP)
(2) When the buzzer output is ON
(BZON = "1" or BZSHT = "1")
(3) When the melody output is ON
(MBUSY = "1")
The conditions (2) and (3) can be selected by mask
option.
Heavy load protection mode
during buzzer output
s
s Normal mode
s
s Heavy load protection mode
Heavy load protection mode
during melody output
s
s Normal mode
s
s Heavy load protection mode
When direct driving a piezoelectric buzzer with the
buzzer (BZ, BZ) or melody signal (MOUT, MOUT),
select Normal mode to reduce current
consumption. When driving an external bipolar
transistor with the BZ or MOUT signal, select
Heavy load protection mode.
When using the melody output terminal (MOUT,
MOUT) for buzzer output, select the same option
for both the buzzer and melody outputs.
For details of the OSC3 oscillation circuit, buzzer
output and melody output, refer to "5.3 Oscillation
Circuits and Operating Mode", "5.12 Sound
Generator" and "5.13 Melody Generator",
respectively.
SLEEP status
Heavy load
protection mode
Mask option
OSCC
BZON
BZSHT
MBUSY
Fig. 2.3.1 Configuration of heavy load protection mode control circuit
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