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Epson Research and Development
Vancouver Design Center
S1D13706 Hardware Functional Specification
X31B-A-001-08 Issue Date: 01/11/13
bit 3 GPIO3 Pin IO Status
When neither a D-TFD panel or a HR-TFT are selected (REG[10h] bits 1:0) and GPIO3 is
configured as an output, writing a 1 to this bit drives GPIO3 high and writing a 0 to this bit
drives GPIO3 low.
When neither a D-TFD panel or a HR-TFT are selected (REG[10h] bits 1:0) and GPIO3 is
configured as an input, a read from this bit returns the status of GPIO3.
When a D-TFD panel is enabled (REG[10h] bits 1:0 = 11), GPIO3 outputs the FRS signal
automatically and writing to this bit has no effect.
When a HR-TFT panel is enabled (REG[10h] bits 1:0 = 10), GPIO3 outputs the SPL sig-
nal automatically and writing to this bit has no effect.
bit 2 GPIO2 Pin IO Status
When neither a D-TFD panel or a HR-TFT are selected (REG[10h] bits 1:0) and GPIO2 is
configured as an output, writing a 1 to this bit drives GPIO2 high and writing a 0 to this bit
drives GPIO2 low.
When neither a D-TFD panel or a HR-TFT are selected (REG[10h] bits 1:0) and GPIO2 is
configured as an input, a read from this bit returns the status of GPIO2.
When a D-TFD panel is enabled (REG[10h] bits 1:0 = 11), GPIO2 outputs the FR signal
automatically and writing to this bit has no effect.
When a HR-TFT panel is enabled (REG[10h] bits 1:0 = 10), GPIO2 outputs the REV sig-
nal automatically and writing to this bit has no effect.
bit 1 GPIO1 Pin IO Status
When neither a D-TFD panel or a HR-TFT are selected (REG[10h] bits 1:0) and GPIO1 is
configured as an output, writing a 1 to this bit drives GPIO1 high and writing a 0 to this bit
drives GPIO1 low.
When neither a D-TFD panel or a HR-TFT are selected (REG[10h] bits 1:0) and GPIO1 is
configured as an input, a read from this bit returns the status of GPIO1.
When a D-TFD panel is enabled (REG[10h] bits 1:0 = 11), GPIO1 outputs the YSCL sig-
nal automatically and writing to this bit has no effect.
When a HR-TFT panel is enabled (REG[10h] bits 1:0 = 10), GPIO1 outputs the CLS sig-
nal automatically and writing to this bit has no effect.
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