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S1D13504 Hardware Functional Specification
X19A-A-002-18 Issue Date: 01/01/30
8.2.6 Power Save Configuration Registers
bit 3 LCD Power Disable
When this bit = 1 the LCDPWR output is directly forced to the Off state. The LCDPWR “On/Off”
state is configured by MD10 at the rising edge of RESET#. When this bit = 0 the LCDPWR output
is controlled by the panel on/off sequencing logic. See Table 5-8: “Summary of Power On / Reset
Options,” on page 31.
bits 2-1 Suspend Re fresh Select Bits [1:0]
These bits specify the type of DRAM refresh to use in Suspend mode.
Note
These bits should not be changed when suspend mode is enabled.
bit 0 Software Suspend Mode Enable
When this bit = 1 software suspend mode is enabled. When this bit = 0 software suspend mode is disabled.
8.2.7 Miscellaneous Registers
bit 7 Host Interface Disable
This bit must be programmed to 0 to enable the Host Interface. This bit goes high on reset. When
this bit is high, all memory and all registers except REG[1Ah] (read-only), REG[28h] through
REG[2Fh], and REG[1Bh] are inaccessible.
Power Save Configuration Register
REG[1Ah] RW
n/a n/a n/a n/a LCD Power
Disable
Suspend
Refresh
Select Bit 1
Suspend
Refresh
Select Bit 0
Software
Suspend
Mode Enable
Table 8-10: Suspend Refresh Selection
Suspend Refresh Select Bits [1:0] DRAM Refresh Type
00 CBR Refresh
01 Self-Refresh
1x No Refresh
Miscellaneous Disable Register
REG[1Bh] RW
Host Interface
Disable n/a n/a n/a n/a n/a n/a Half Frame
Buffer Disable