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yaga_3967241
Level 3
Level 3
50 sign-ins 25 sign-ins 10 replies posted

Hi,

For PSoC LP5 pin voltage, is it true that some pins are 3.3V when setting to high, some pins are 1.8V when setting to high? Or all the pins are of same voltage when setting to high?

Regards,

Winston

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1 Solution
Arpit_S
Moderator
Moderator
Moderator
50 likes received 250 replies posted 100 solutions authored

Hi @yaga_3967241 ,

 

In PSoC 5 there are multiple VDDIO (like VDDIO0, VDDIO1, VDDIO2, VDDIO3) each of them power-up different ports. For example: 

VDDIO                      Port Pins
VDDIO0                    P0[7:0], P4[7:0], P12[3:2]
VDDIO1                    P1[7:0], P5[7:0], P12[7:6]
VDDIO2                    P2[7:0], P6[7:0], P12[5:4], P15[5:4]
VDDIO3                    P3[7:0], P12[1:0], P15[3:0]

Please refer to https://www.infineon.com/dgdl/Infineon-PSoC_5LP_CY8C58LP_Family_Datasheet_Programmable_System-on-Chi... for more details

VDDIO0, VDDIO1, VDDIO2, VDDIO3. Supply for I/O pins. Each
VDDIO must be tied to a valid operating voltage (1.71 V to 5.5 V),
and must be less than or equal to VDDA.
Can you guide us which kit or you using?

 

Kind regards

Arpit Srivastav

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2 Replies
Arpit_S
Moderator
Moderator
Moderator
50 likes received 250 replies posted 100 solutions authored

Hi @yaga_3967241 ,

 

In PSoC 5 there are multiple VDDIO (like VDDIO0, VDDIO1, VDDIO2, VDDIO3) each of them power-up different ports. For example: 

VDDIO                      Port Pins
VDDIO0                    P0[7:0], P4[7:0], P12[3:2]
VDDIO1                    P1[7:0], P5[7:0], P12[7:6]
VDDIO2                    P2[7:0], P6[7:0], P12[5:4], P15[5:4]
VDDIO3                    P3[7:0], P12[1:0], P15[3:0]

Please refer to https://www.infineon.com/dgdl/Infineon-PSoC_5LP_CY8C58LP_Family_Datasheet_Programmable_System-on-Chi... for more details

VDDIO0, VDDIO1, VDDIO2, VDDIO3. Supply for I/O pins. Each
VDDIO must be tied to a valid operating voltage (1.71 V to 5.5 V),
and must be less than or equal to VDDA.
Can you guide us which kit or you using?

 

Kind regards

Arpit Srivastav

Len_CONSULTRON
Level 9
Level 9
Beta tester 500 solutions authored 1000 replies posted

Winston,

As   pointed out, certain GPIO pins are driven by specific VDDIO domains.  This allows for you to have GPIO pins that use a 1.8V,  2.7V, 3.3V, and a 5.0V as '1' should you choose to do so.

Are you looking to use different GPIOs with different input/output voltages?

I commonly use the CY8CKIT-059 eval board where VDDA, VDDD and all VDDIOs are attached to 5V.  The SIO pins (on Port 12) have the ability to level-translate to lower voltages by using an internal voltage reference source.  This allows these 8 pins to interface to external logic other than 5V.

Len
"Engineering is an Art. The Art of Compromise."