3. Port structure
A96G140/A96G148/A96A148 User’s manual
28
Figure 9. External Interrupt I/O Port
VDD
VDD
VDD
PAD
SUB-FUNC ENABLE
LevelShift (1.8V to ExtVDD)
LevelShift (ExtVDD to 1.8V)
DATA
REGISTER
OPEN DRAIN
REGISTER
PULL-UP
REGISTER
SUB-FUNC DATA OUTPUT
DIRECTION
REGISTER
SUB-FUNC DIRECTION
0
1
MUX
MUX
0
1
0
1
MUX
r
D
CP
Q
DEBOUNCE
CLK
DEBOUNCE
ENABLE
PORTx INPUT
SUB-FUNC
DATA INPUT
ANALOG CHANNEL
ENABLE
ANALOG INPUT
0
1
MUX
r
D
CP
Q
VDD
EXTERNAL
INTERRUPT
INTERRUPT
ENABLE
EDGE
REG
FLAG
CLEAR
POLARITY
REG
R(400
Ω
)
CMOS or
SchmittLevel
Input