---
title: ta
framework: cryptotokenkit
role: symbol
role_heading: Instance Property
path: cryptotokenkit/tksmartcardatr/interfacegroup/ta
---

# ta

The TA interface byte of ATR group, or nil if TA is not present.

## Declaration

```swift
var ta: NSNumber? { get }
```

## See Also

### Accessing Interface Group Protocol and Bytes

- [protocol](cryptotokenkit/tksmartcardatr/interfacegroup/protocol.md)
- [tb](cryptotokenkit/tksmartcardatr/interfacegroup/tb.md)
- [tc](cryptotokenkit/tksmartcardatr/interfacegroup/tc.md)