This is the new *CloudFormation Template Reference Guide*. Please update your bookmarks and links. For help getting started with CloudFormation, see the [AWS CloudFormation User Guide](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/Welcome.html).
# AWS::EC2::Instance CreditSpecification

Specifies the credit option for CPU usage of a T instance.
`CreditSpecification` is a property of the [AWS::EC2::Instance](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-ec2-instance.html) resource.
For more information, see [Burstable performance instances](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/burstable-performance-instances.html) in the *Amazon EC2 User Guide*.
## Syntax

To declare this entity in your CloudFormation template, use the following syntax:
### JSON

```
{
 "[CPUCredits](#cfn-ec2-instance-creditspecification-cpucredits)" : {{String}}
}
```
### YAML

```
 [CPUCredits](#cfn-ec2-instance-creditspecification-cpucredits): {{String}}
```
## Properties

`CPUCredits` 
The credit option for CPU usage of the instance. 
Valid values: `standard` \| `unlimited` 
T3 instances with `host` tenancy do not support the `unlimited` CPU credit option. 
*Required*: No 
*Type*: String 
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