S1D13742 Epson, S1D13742 Datasheet - Page 73

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

Epson Research and Development
Vancouver Design Center
bits 7-0
bits 7-0
bits 7-0
Hardware Functional Specification
Issue Date: 2007/09/18
REG[60h] GPIO Negative Edge Interrupt Trigger Register
Default = 00h
REG[62h] GPIO Interrupt Status Register
Default = 00h
REG[64h] GPIO Pull Down Control Register 0
Default = FFh
GPIO7 Pull-down
GPIO7 Negative
GPIO7 Interrupt
Edge Interrupt
Trigger
Control
Status
7
7
7
GPIO6 Pull-down
GPIO6 Negative
GPIO6 Interrupt
Edge Interrupt
Trigger
Control
Status
6
6
6
Note
GPIO[7:0] Negative Edge Interrupt Trigger
Setting these bits = 1, will enable the associated interrupt.
This bit determines whether the associated GPIO interrupt is triggered on the negative
edge (when the GPIOx pin changes from 1 to 0).
When this bit = 0, the associated GPIOx interrupt (GPIO_INT) is disabled.
When this bit = 1, the associated GPIOx interrupt (GPIO_INT) is triggered on the negative
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])
GPIO[7:0] Interrupt Status
If configured to generate an Interrupt (GPIO_INT), this status bit will show which GPIO
generated the interrupt. To clear this status bit, you must perform two writes to it: first
write = 1, the second write = 0.
GPIO[7:0] Pull-down Control
All GPIO pins have internal pull-down resistors. These bits individually control the state
of the pull-down resistors.
When the bit = 0, the pull-down resistor for the associated GPIO pin is inactive.
When the bit = 1, the pull-down resistor for the associated GPIO pin is active.
The GPIO_INT pin will also toggle back to 0 upon clearing the status. However, if the
original interrupt condition still exists on the GPIO input pin, the GPIO_INT will imme-
diately set again.
GPIO5 Pull-down
GPIO5 Negative
GPIO5 Interrupt
Edge Interrupt
Trigger
Control
Status
5
5
5
Revision 6.01 - EPSON CONFIDENTIAL
GPIO4 Pull-down
GPIO4 Negative
GPIO4 Interrupt
Edge Interrupt
Trigger
Control
Status
4
4
4
w
GPIO3 Pull-down
GPIO3 Negative
GPIO3 Interrupt
Edge Interrupt
w
Trigger
w
Control
Status
3
3
.
3
D
a
t
GPIO2 Pull-down
a
GPIO2 Negative
GPIO2 Interrupt
Edge Interrupt
S
Trigger
Control
Status
h
2
2
2
e
e
t
.
GPIO1 Pull-down
GPIO1 Negative
GPIO1 Interrupt
Edge Interrupt
c
o
Trigger
Control
Status
.
1
1
1
k
r
Read/Write
Read/Write
Read/Write
GPIO0 Pull-down
GPIO0 Negative
GPIO0 Interrupt
X63A-A-001-06
Edge Interrupt
Trigger
Control
Status
S1D13742
0
0
0
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