Specifications

S1C6S2N7 TECHNICAL SOFTWARE EPSON II-45
CHAPTER 3: PERIPHERAL CIRCUITS (SVD Circuit and Heavy Load Protection Function)
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")
The heavy load protection mode switches the constant
voltage circuit of the LCD system to the high-stability
mode from the low current consumption mode.
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 protec-
tion mode with the software.
Supply voltage
Criteria voltage
HLMOD register
Heavy load
protection mode
2 Hz clock
SVD circuit
SVDDT register
SVDON register
100 µs or more
Supply voltage
Criteria voltage
SVDON register
2 Hz clock
SVD circuit
SVDDT register
Heavy load
protection mode
HLMOD register
Fig. 3.8.3
Timing chart of heavy
load protection
function operation
through the SVDON
register
Fig. 3.8.2
Timing chart of
supply voltage
detection operation
through the HLMOD
register