Philips Semiconductors

Product data

SCC2681T

Dual asynchronous receiver/transmitter (DUART)

2004 Apr 06

10

RDN

IP0–IP6

WRN

OP0–OP7

tPS

tPH

OLD DATA

NEW DATA

(a) INPUT PINS

tPD

(b) OUTPUT PINS

SD00101

Figure 5. Port Timing

NOTES:

1.

INTRN or OP3-OP7 when used as interrupt outputs.

2.

The test for open drain outputs is intended to guarantee switching of the output transistor. Measurement of this response is referenced from the midpoint of the switching

test environment are pronounced and can greatly affect the resultant measurement.

VM

VOL +0.5V

VOL

WRN

OUTPUT

tIR

SD00102

Figure 6. Interrupt Timing