Mixing
What is the use of the capacitors in this schematic?
Clash Royale CLAN TAG#URR8PPP
up vote
1
down vote
favorite
I'm using an STM32L476RG microcontroller where the recommended schematic was as follows -
I was wondering what the purpose of C25 and C22 were, as SB38 and SB32 are shorted in my nucleo development board. So, what is the purpose of these capacitors when they are shorted.
Edit - Since the picture is unclear, I have attached the link to the reference manual here. The schematic is in page 64. STM32L476RG reference manual
Why have they used C25 and C22 when SB38 and SB33 are shorted in the schematic?
capacitor stm32
asked 2 hours ago
blazingcannon
183
New contributor
blazingcannon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |Â
up vote
1
down vote
favorite
I'm using an STM32L476RG microcontroller where the recommended schematic was as follows -
I was wondering what the purpose of C25 and C22 were, as SB38 and SB32 are shorted in my nucleo development board. So, what is the purpose of these capacitors when they are shorted.
Edit - Since the picture is unclear, I have attached the link to the reference manual here. The schematic is in page 64. STM32L476RG reference manual
Why have they used C25 and C22 when SB38 and SB33 are shorted in the schematic?
capacitor stm32
asked 2 hours ago
blazingcannon
183
New contributor
blazingcannon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
2
What VCAP? I don't see any VCAP. In fact, I can't read any of the text at all, due to it having been shrunk to oblivion. -1 because that should have been obvious. Closing as unclear.
– Olin Lathrop
2 hours ago
add a comment |Â
up vote
1
down vote
favorite
up vote
1
down vote
favorite
I'm using an STM32L476RG microcontroller where the recommended schematic was as follows -
I was wondering what the purpose of C25 and C22 were, as SB38 and SB32 are shorted in my nucleo development board. So, what is the purpose of these capacitors when they are shorted.
Edit - Since the picture is unclear, I have attached the link to the reference manual here. The schematic is in page 64. STM32L476RG reference manual
Why have they used C25 and C22 when SB38 and SB33 are shorted in the schematic?
capacitor stm32
asked 2 hours ago
blazingcannon
183
New contributor
blazingcannon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I'm using an STM32L476RG microcontroller where the recommended schematic was as follows -
I was wondering what the purpose of C25 and C22 were, as SB38 and SB32 are shorted in my nucleo development board. So, what is the purpose of these capacitors when they are shorted.
Edit - Since the picture is unclear, I have attached the link to the reference manual here. The schematic is in page 64. STM32L476RG reference manual
Why have they used C25 and C22 when SB38 and SB33 are shorted in the schematic?
capacitor stm32
capacitor stm32
asked 2 hours ago
blazingcannon
183
New contributor
blazingcannon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 2 hours ago
blazingcannon
183
New contributor
blazingcannon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 1 hour ago
asked 2 hours ago
blazingcannon
183
New contributor
blazingcannon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 2 hours ago
blazingcannon
183
asked 2 hours ago
blazingcannon
183
183
New contributor
blazingcannon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
blazingcannon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
blazingcannon is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
2
What VCAP? I don't see any VCAP. In fact, I can't read any of the text at all, due to it having been shrunk to oblivion. -1 because that should have been obvious. Closing as unclear.
– Olin Lathrop
2 hours ago
add a comment |Â
2
What VCAP? I don't see any VCAP. In fact, I can't read any of the text at all, due to it having been shrunk to oblivion. -1 because that should have been obvious. Closing as unclear.
– Olin Lathrop
2 hours ago
2
2
What VCAP? I don't see any VCAP. In fact, I can't read any of the text at all, due to it having been shrunk to oblivion. -1 because that should have been obvious. Closing as unclear.
– Olin Lathrop
2 hours ago
What VCAP? I don't see any VCAP. In fact, I can't read any of the text at all, due to it having been shrunk to oblivion. -1 because that should have been obvious. Closing as unclear.
– Olin Lathrop
2 hours ago
add a comment |Â
2 Answers
2
active
oldest
votes
up vote
4
down vote
accepted
Based on experience with other devices from the STM32 family I can tell the Vcap is a capacitor used to the internal voltage regulator. This is a mandatory part.
However, the STM32L476RG does not have Vcap pins. But the STM32 families are closely pin compatible. With only a few modifications.
I suspect your example board is suitable for more than only the STM32L476RG, and can also be used for part that do need Vcap. On you're part it's just Vdd/Vss, as for why the jumpers are shorted.
There is also a note on the schematic, mentioning VCAP for the F200 and F429:
F200/F429:VCAP1
F373:SD_VREF+
F373:PB14
F373:PB15
F373:PD8
F030R8/F373:PF6 & F200/F429:VCAP2
answered 1 hour ago
Jeroen3
9,5191241
add a comment |Â
up vote
-1
down vote
If you look into datasheet, these pins are Vss with no mention of another function. Ask developers of this circuit why they put names not compliant to the datasheet. Alternatively you use wrong microcontroller as circuit does not explicitly state part number (as far as I can see on the low-res image).
answered 2 hours ago
Anonymous
4,6121626
add a comment |Â
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
4
down vote
accepted
Based on experience with other devices from the STM32 family I can tell the Vcap is a capacitor used to the internal voltage regulator. This is a mandatory part.
However, the STM32L476RG does not have Vcap pins. But the STM32 families are closely pin compatible. With only a few modifications.
I suspect your example board is suitable for more than only the STM32L476RG, and can also be used for part that do need Vcap. On you're part it's just Vdd/Vss, as for why the jumpers are shorted.
There is also a note on the schematic, mentioning VCAP for the F200 and F429:
F200/F429:VCAP1
F373:SD_VREF+
F373:PB14
F373:PB15
F373:PD8
F030R8/F373:PF6 & F200/F429:VCAP2
answered 1 hour ago
Jeroen3
9,5191241
add a comment |Â
up vote
4
down vote
accepted
Based on experience with other devices from the STM32 family I can tell the Vcap is a capacitor used to the internal voltage regulator. This is a mandatory part.
However, the STM32L476RG does not have Vcap pins. But the STM32 families are closely pin compatible. With only a few modifications.
I suspect your example board is suitable for more than only the STM32L476RG, and can also be used for part that do need Vcap. On you're part it's just Vdd/Vss, as for why the jumpers are shorted.
There is also a note on the schematic, mentioning VCAP for the F200 and F429:
F200/F429:VCAP1
F373:SD_VREF+
F373:PB14
F373:PB15
F373:PD8
F030R8/F373:PF6 & F200/F429:VCAP2
answered 1 hour ago
Jeroen3
9,5191241
add a comment |Â
up vote
4
down vote
accepted
up vote
4
down vote
accepted
Based on experience with other devices from the STM32 family I can tell the Vcap is a capacitor used to the internal voltage regulator. This is a mandatory part.
However, the STM32L476RG does not have Vcap pins. But the STM32 families are closely pin compatible. With only a few modifications.
I suspect your example board is suitable for more than only the STM32L476RG, and can also be used for part that do need Vcap. On you're part it's just Vdd/Vss, as for why the jumpers are shorted.
There is also a note on the schematic, mentioning VCAP for the F200 and F429:
F200/F429:VCAP1
F373:SD_VREF+
F373:PB14
F373:PB15
F373:PD8
F030R8/F373:PF6 & F200/F429:VCAP2
answered 1 hour ago
Jeroen3
9,5191241
Based on experience with other devices from the STM32 family I can tell the Vcap is a capacitor used to the internal voltage regulator. This is a mandatory part.
However, the STM32L476RG does not have Vcap pins. But the STM32 families are closely pin compatible. With only a few modifications.
I suspect your example board is suitable for more than only the STM32L476RG, and can also be used for part that do need Vcap. On you're part it's just Vdd/Vss, as for why the jumpers are shorted.
There is also a note on the schematic, mentioning VCAP for the F200 and F429:
F200/F429:VCAP1
F373:SD_VREF+
F373:PB14
F373:PB15
F373:PD8
F030R8/F373:PF6 & F200/F429:VCAP2
answered 1 hour ago
Jeroen3
9,5191241
edited 1 hour ago
answered 1 hour ago
Jeroen3
9,5191241
answered 1 hour ago
Jeroen3
9,5191241
answered 1 hour ago
Jeroen3
9,5191241
9,5191241
add a comment |Â
add a comment |Â
up vote
-1
down vote
If you look into datasheet, these pins are Vss with no mention of another function. Ask developers of this circuit why they put names not compliant to the datasheet. Alternatively you use wrong microcontroller as circuit does not explicitly state part number (as far as I can see on the low-res image).
answered 2 hours ago
Anonymous
4,6121626
add a comment |Â
up vote
-1
down vote
If you look into datasheet, these pins are Vss with no mention of another function. Ask developers of this circuit why they put names not compliant to the datasheet. Alternatively you use wrong microcontroller as circuit does not explicitly state part number (as far as I can see on the low-res image).
answered 2 hours ago
Anonymous
4,6121626
add a comment |Â
up vote
-1
down vote
up vote
-1
down vote
If you look into datasheet, these pins are Vss with no mention of another function. Ask developers of this circuit why they put names not compliant to the datasheet. Alternatively you use wrong microcontroller as circuit does not explicitly state part number (as far as I can see on the low-res image).
answered 2 hours ago
Anonymous
4,6121626
If you look into datasheet, these pins are Vss with no mention of another function. Ask developers of this circuit why they put names not compliant to the datasheet. Alternatively you use wrong microcontroller as circuit does not explicitly state part number (as far as I can see on the low-res image).
answered 2 hours ago
Anonymous
4,6121626
answered 2 hours ago
Anonymous
4,6121626
answered 2 hours ago
Anonymous
4,6121626
answered 2 hours ago
Anonymous
4,6121626
4,6121626
add a comment |Â
add a comment |Â
blazingcannon is a new contributor. Be nice, and check out our Code of Conduct.
blazingcannon is a new contributor. Be nice, and check out our Code of Conduct.
blazingcannon is a new contributor. Be nice, and check out our Code of Conduct.
blazingcannon is a new contributor. Be nice, and check out our Code of Conduct.
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
StackExchange.ready(
function ()
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2felectronics.stackexchange.com%2fquestions%2f398221%2fwhat-is-the-use-of-the-capacitors-in-this-schematic%23new-answer', 'question_page');
);
Post as a guest
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Sign up or log in
StackExchange.ready(function ()
StackExchange.helpers.onClickDraftSave('#login-link');
);
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
2
What VCAP? I don't see any VCAP. In fact, I can't read any of the text at all, due to it having been shrunk to oblivion. -1 because that should have been obvious. Closing as unclear.
– Olin Lathrop
2 hours ago