S1D13742 Epson, S1D13742 Datasheet - Page 72

• Manufacturer Part Number: S1D13742
• Description: Mobile Graphics Engine
• Manufacturer: Epson

Page 72
9.3.10 General Purpose IO Pins Registers
bits 7-0
bits 7-0
bits 7-0
S1D13742
X63A-A-001-06
REG[5Ah] General Purpose IO Pins Configuration Register 0
Default =00h
REG[5Ch] General Purpose IO Pins Status/Control Register 0
Default = 00h
REG[5Eh] GPIO Positive Edge Interrupt Trigger Register
Default = 00h
GPIO7 Positive
Edge Interrupt
GPIO7 Status
Configuration
Trigger
GPIO7
7
7
7
GPIO6 Positive
Edge Interrupt
GPIO6 Status
Configuration
Trigger
GPIO6
6
6
6
Note
Note
GPIO[7:0] Configuration
When this bit = 0 (normal operation), the associated GPIO is configured as an input pin.
When this bit = 1, the associated GPIO is configured as an output pin.
GPIO[7:0] Status
When the associated GPIO is configured as an output, writing a 1 to this bit drives it high
and writing a 0 to this bit drives it low.
When the associated GPIO is configured as an input, a read from this bit returns the raw
status.
GPIO[7:0] Positive Edge Interrupt Trigger
Setting these bits = 1, will enable the associated interrupt.
This bit determines whether the associated GPIO interrupt is triggered on the positive edge
(when the GPIOx pin changes from 0 to 1).
When this bit = 0, the associated GPIO interrupt (GPIO_INT) is disabled.
When this bit = 1, the associated GPIO interrupt (GPIO_INT) is triggered on the positive
edge.
Once triggered, the GPIO_INT pin will toggle from 0 to 1. The GPIO_INT pins is cleared
(non-active state (0)) by clearing the associated GPIO Interrupt Status bit (REG[62])
When configured as an input or an output, the associated GPIO can also be configured
to produce an interrupt (GPIO_INT) based on selectable Interrupt Trigger conditions
(see REG[5E], [60])
When configured as an output, the GPIO_INT pin can still be toggled by writing the ap-
propriate value to this register if enabled by REG[5E],[60].
GPIO5 Positive
Edge Interrupt
GPIO5 Status
Configuration
Trigger
GPIO5
5
5
5
Revision 6.01 - EPSON CONFIDENTIAL
GPIO4 Positive
Edge Interrupt
GPIO4 Status
Configuration
Trigger
GPIO4
4
4
4
GPIO3 Positive
Edge Interrupt
GPIO3 Status
Configuration
w
Trigger
GPIO3
w
3
3
3
w
.
D
a
GPIO2 Positive
Edge Interrupt
GPIO2 Status
Configuration
t
Trigger
GPIO2
a
2
2
2
S
h
e
Epson Research and Development
e
Hardware Functional Specification
GPIO1 Positive
t
Edge Interrupt
GPIO1 Status
Configuration
.
Trigger
GPIO1
c
1
1
1
Vancouver Design Center
o
Issue Date: 2007/09/18
.
k
r
Read/Write
Read/Write
Read/Write
GPIO0 Positive
Edge Interrupt
GPIO0 Status
Configuration
GPIO0
Trigger
0
0
0
D
a
t
a