CY8C3245LTI-144T Datasheet, PDF (76/128 Pages) Cypress Semiconductor – Programmable System-on-Chip (PSoC®)

PSoC^® 3: CY8C32 Family Data Sheet
11.4 Inputs and Outputs
Specifications are valid for –40 °C  T_A  85 °C and T_J  100 °C, except where noted. Specifications are valid for 1.71 V to 5.5 V,
except where noted. Unless otherwise specified, all charts and graphs show typical values.
When the power supplies ramp up, there are low-impedance connections between each GPIO pin and its V_DDIO supply. This causes
the pin voltages to track V_DDIO until both V_DDIO and V_DDA reach the IPOR voltage, which can be as high as 1.45 V. At that point, the
low-impedance connections no longer exist and the pins change to their normal NVL settings.
11.4.1 GPIO
Table 11-9. GPIO DC Specifications
Parameter
Description
Conditions
Min
Typ
V_IH
Input voltage high threshold
V_IL
Input voltage low threshold
V_IH
Input voltage high threshold
V_IH
Input voltage high threshold
V_IL
Input voltage low threshold
V_IL
Input voltage low threshold
V_OH
Output voltage high
V_OL
Output voltage low
Rpullup Pull-up resistor
CMOS Input, PRT[×]CTL = 0 0.7  V_DDIO –
CMOS Input, PRT[×]CTL = 0
–
–
LVTTL Input, PRT[×]CTL = 0.7 × V_DDIO –
1, V_DDIO < 2.7 V
LVTTL Input, PRT[×]CTL =
2.0
–
1, V_DDIO  2.7V
LVTTL Input, PRT[×]CTL =
–
–
1, V_DDIO < 2.7 V
LVTTL Input, PRT[×]CTL =
–
–
1, V_DDIO  2.7V
I_OH = 4 mA at 3.3 V_DDIO
V_DDIO – 0.6 –
I_OH = 1 mA at 1.8 V_DDIO
V_DDIO – 0.5 –
I_OL = 8 mA at 3.3 V_DDIO
–
–
I_OL = 4 mA at 1.8 V_DDIO
–
–
I_OL = 3 mA at 3.3 V_DDIO
–
–
3.5
5.6
Rpulldown Pull-down resistor
3.5
5.6
I_IL
Input leakage current (absolute value)^[36]]
25 °C, V_DDIO = 3.0 V
–
–
C_IN
Input capacitance^[36]
GPIOs not shared with
–
4
opamp outputs, MHz ECO or
kHzECO
GPIOs shared with MHz
ECO or kHzECO^[37]
–
5
V_H
Idiode
Rglobal
Rmux
Input voltage hysteresis (Schmitt-Trigger)^[36]
GPIOs shared with opamp
outputs
Current through protection diode to V_DDIO and
V_SSIO
Resistance pin to analog global bus
25 °C, V_DDIO = 3.0 V
Resistance pin to analog mux bus
25 °C, V_DDIO = 3.0 V
–
–
–
40
–
–
–
320
–
220
Max
–
0.3 V_DDIO
–
–
0.3 × V_DDIO
0.8
–
–
0.6
0.6
0.4
8.5
8.5
2
7
7
18
–
100
–
–
Units
V
V
V
V
V
V
V
V
V
V
V
k
k
nA
pF
pF
pF
mV
µA


Notes
36. Based on device characterization (Not production tested).
37. For information on designing with PSoC oscillators, refer to the application note, AN54439 - PSoC^® 3 and PSoC 5 External Oscillator.
Document Number: 001-56955 Rev. *Y
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