SCC2698B Philips Semiconductors, SCC2698B Datasheet - Page 22

• Manufacturer Part Number: SCC2698B
• Description: Enhanced octal universal asynchronous receiver/transmitter Octal UART
• Manufacturer: Philips Semiconductors

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Philips Semiconductors
2000 Jan 31
Enhanced octal universal asynchronous
receiver/transmitter (Octal UART)
NOTES:
1. INCLUDES MPP WHEN USED AS TxRDY or RxDY/FFULL OUTPUTS AS WELL AS INTRN.
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 SIGNAL, V
SURES TRUE SWITCHING HAS OCCURRED. BEYOND THIS LEVEL, THE EFFECTS OF EXTERNAL CIRCUITRY AND TEST ENVIRONMENT ARE PRONOUNCED
AND CAN GREATLY AFFECT THE RESULTANT MEASUREMENT.
MPIx OR
MPPx
MPOx
WRN
RDN
RDN
INTERRUPT
INTERRUPT
OUTPUT
OUTPUT
WRN
RDN
1
1
t
PS
OLD DATA
t
Figure 8. Interrupt Timing
PD
Figure 7. Port Timing
M
, TO A POINT 0.5V ABOVE V
t
IR
22
V
M
OL
t
IR
. THIS POINT REPRESENTS NOISE MARGIN THAT AS-
t
PD
V
t
PH
OL
V
OL
+0.5V
+0.5V
V
OL
NEW DATA
V
OL
SCC2698B
Product specification
SD00189
SD00190