Functional Overview

2.6.5Instantiating two data out pads

To provide the option of being able to drive the external data out line with either an open drain or buffered output, two data out buffers can be instantiated. Figure 2-14 shows how these two data pads are connected.

The connection back from either of the data out driver options (A) or (B) is then made external to the SCI interface.

Pads

SCIDATAIN

nSCIDATAEN

Option (A)

nSCIDATAOUTEN

(TxData)

Vdd

Option (B)

0v

Figure 2-14 Instantiation of two data out pads to provide data drive options

Functional Overview