CY7C63221A-PXC Cypress Semiconductor Corp, CY7C63221A-PXC Datasheet - Page 35

• Manufacturer Part Number: CY7C63221A-PXC
• Description: IC MCU 3K USB LS PERIPH 16-DIP
• Manufacturer: Cypress Semiconductor Corp
• Series: enCoRe™r

Specifications of CY7C63221A-PXC

• Applications: USB Microcontroller
• Core Processor: M8B
• Program Memory Type: OTP (3 kB)
• Controller Series: CY7C632xx
• Ram Size: 96 x 8
• Interface: USB
• Number Of I /o: 8
• Voltage - Supply: 3.5 V ~ 5.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 16-DIP (0.300", 7.62mm)
• Operating Temperature (max): 70C
• Operating Temperature (min): 0C
• Operating Temperature Classification: Commercial
• Mounting: Through Hole
• Pin Count: 16
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 428-1861; CY7C63221A-PXC

The polarity that triggers an interrupt is controlled independently for each GPIO pin by the GPIO Interrupt Polarity Registers.
Figure 19-6 and Figure 19-7 control the interrupt polarity of each GPIO pin.
Bit [7:0]: P0[7:0] Interrupt Polarity
Bit [7:0]: P1[7:0] Interrupt Polarity
Document #: 38-08028 Rev. *B
Read/Write
Read/Write
GPIO
Pin
Bit Name
Bit Name
1 = Rising GPIO edge
0 = Falling GPIO edge
1 = Rising GPIO edge
0 = Falling GPIO edge
Reset
Reset
IRA
Bit #
Bit #
1 = Enable
0 = Disable
W
7
0
7
0
-
Port Bit Interrupt
Enable Register
Port Bit Interrupt
Polarity Register
Figure 19-6. Port 0 Interrupt Polarity Register (Address 0x06)
Figure 19-7. Port 1 Interrupt Polarity Register (Address 0x07)
W
6
0
6
0
-
M
U
X
FOR
FOR
Figure 19-8. GPIO Interrupt Diagram
W
5
0
5
0
-
1 = Enable
0 = Disable
Reserved
(1 input per
OR Gate
GPIO pin)
P0 Interrupt Polarity
W
(Bit 6, Register 0x20)
4
0
4
0
-
GPIO Interrupt
Global
Enable
1
GPIO Interrupt
Flip Flop
W
3
0
3
0
-
D
CLR
Q
W
2
0
2
0
-
CY7C63221/31A
enCoRe™ USB
Interrupt
Encoder
Priority
P1[1:0] Interrupt Polarity
W
W
1
0
1
0
Page 35 of 50
Interrupt
IRQout
Vector
W
W
0
0
0
0
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