sed1355 ETC-unknow, sed1355 Datasheet - Page 188

• Manufacturer Part Number: sed1355
• Description: Sed1355 Embedded Ramdac Lcd/crt Controller
• Manufacturer: ETC-unknow

Page 32
6.3 LCD Enable/Disable
Power On/Enable Sequence
Power Off/Disable Sequence
SED1355
X23A-G-003-05
The following is the recommended sequence for manually powering-up an LCD panel. These steps
would be used if power supply timing requirements were larger than the timings built into the
SED1355 power enable sequence.
1.
2.
3.
4.
The following is the recommended sequence for manually powering-down an LCD panel. These
steps would be used if power supply timing requirements were larger than the timings built into the
SED1355 power disable sequence.
1.
2.
3.
Set REG[1Ah] bit 3 to 1. Ensure that LCD power is disabled.
Set REG[0Dh] bit 0 to 1. Turn on the LCD outputs.
Count ’x’ Vertical Non-Display Periods.
’x’ corresponds the power supply discharge time converted to the equivalent vertical non-dis-
play periods.
Set REG[1Ah] bit 3 to 0. This enables LCD Power.
Set REG[1Ah] bit 3 to 1 - disable LCD Power.
Count ’x’ Vertical Non-Display Periods.
’x’ corresponds to the power supply discharge time converted to the equivalent vertical non-
display periods.
Set REG[0Dh] bit 0 to 0 - turn off the LCD outputs.
Epson Research and Development
Programming Notes and Examples
Vancouver Design Center
Issue Date: 99/04/27