Sony CXD5602 User Manual page 97

3.2.4.3 External Interrupt
Selected I/O pins described in the section 3.2.4.2 and some other pins (refer to Table General Purpose
Input/Output (GPIO)-27) can be communicated to SYSCPU and DSP as external interrupts with no changes.
Besides, not only I/O pins' values themselves can be communicated to SYSCPU and DSP, but information that an
event has been detected (refer to 3.2.4.4) can be as well.
Figure General Purpose Input/Output (GPIO)-20 shows the function in the Event Detect Block, which is explained
in this section.
Output Selection

0: The value of the I/O pin is communicated as an interrupt signal with no changes.

1: The inverted value of the I/O pin is communicated as an interrupt signal.

2: The result of the event detection is communicated as an interrupt signal with no changes.

3: When an event is detected, the register is asserted and communicated as a latched interrupt signal.

4-7: The output value is tied to "0".
Event Detect
CRG
4
SCU
4
RTC0
GNSS
SYSIOP_SUB
HI F_DETECT_I2C
_SLAVE
INT_PMIC_I2CM
PMU
External
signal select
from I/O
......
USB_VBUS
PMIC_INT
SEN_INT
HVDD_DET
HIF_UART_RXD
HIF_SPI_CS_X
HIF_SCL_LOW
Figure General Purpose Input/Output (GPIO)-20 External Interrupt Selection
Internal signal detection
0
Pos edge
14
1
External signal detection
20
Instant High
Instant Low
0
Level High
Chattering removal
1
Level Low
Pos edge
Neg edge
Pos/Neg edge
－97/1010－
Pulse
S et
C lr
Pulse
0
Pulse 0
1
Level
2
Level
3
S et
C lr
Pulse
4
Pulse
5
Pulse
6
or
CXD5602 User Manual
Wakeup factor
(to PMU)
14
20
Interrupt
(to CPU/DSP)
16
EXDEVICE[11:0]
USBVBUS
USBVBUSN
0
HVDD
1
PMIC_INT
2
3
4