CYW20702
Table 13. Digital I/O Characteristics
Characteristics
Input low voltage (VDDO = 3.3V)
Input high voltage (VDDO = 3.3V)
Input low voltage (VDDO = 1.8V)
Input high voltage (VDDO = 1.8V)
Output low voltage
Symbol
Minimum
Typical
Maximum
Unit
VIL
–
–
–
–
–
–
–
–
–
–
–
–
–
–
0.8
–
V
VIH
VIL
VIH
VOL
VOH
IIL
2.0
V
–
0.6
–
V
1.1
V
–
0.4
–
V
Output high voltage
VDDO – 0.4V
V
Input low current
–
–
–
–
–
–
–
1.0
1.0
3.0
3.0
3.0
3.0
0.4
μA
μA
Input high current
IIH
Output low current (VDDO = 3.3V, VOL = 0.4V)
Output high current (VDDO = 3.3V, VOH = 2.9V)
Output low current (VDDO = 1.8V, VOL = 0.4V)
Output high current (VDDO = 1.8V, VOH = 1.4V)
Input capacitance
IOL
IOH
IOL
IOH
CIN
mA
mA
mA
mA
pF
Note: GPIO_3/LINK_IND has a 10 mA IOH or IOL driver current that can be used for an LED.
Note: By default, the drive strength settings specified in Table 13 are for 3.3V. To achieve the required drive strength for a VDDIO of
2.5V or 1.8V, contact a Cypress technical support representative (see “IoT Resources” for contact information).
Table 14. Pad I/O Characteristicsa
Pad Name
Pull-Up/Pull-Down
Fail-Safe
COEX_IN
PCM_CLK
PCM_OUT
PCM_IN
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
Y
N
N
Y
Y
Y
PCM_SYNC
UART_RTS_N
UART_CTS_N
UART_RXD
UART_TXD
GPIO_0
Y
Y
Y
Y
Y
Y
GPIO_1
Y
GPIO_4
Y
GPIO_7
Y
RST_N
N/A
N/A
N/A
Y
USB D+
USB D-
CFG_SEL
OTP_DIS
Y
a. All digital I/O internal pull-up or pull-down values are around 60 kΩ. This does not include the USB signals.
Document Number: 002-14773 Rev. *L
Page 32 of 55
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