sh6611a SinoWealth Micro-Electronics Corp. Ltd, sh6611a Datasheet - Page 13

• Manufacturer Part Number: sh6611a
• Description: 1k 4-bit Microcontroller With Lcd Driver
• Manufacturer: SinoWealth Micro-Electronics Corp. Ltd

9. HEAVY LOAD Mode(HLM) When set , more current will be provide to oscillator circuit to avoid supply current drop that
usually takes place in heavy output load. Perform heavy load driving only after setting up at least 1ms wait time through the
software, after switching to the heavy load mode.
This mode is designed for the 32KHz crystal oscillator, so that the oscillation can be maintained in a noisy power
environment. The power might drop suddenly when the ALARM is driving a speaker. The HLM is designed to control this
power variation. The consumption of power will increase during the use of the HLM mode, but it will not affect the RC
oscillator.
Note: The HLM needs about 5 instruction cycles to set-up the oscillation for 32.768KHz crystal oscillator.
HLM waveform
Heavy load
HLM
OFF
ON
1
0
1ms or more
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SH6611A
Ver 0.0