Philips Semiconductors

Product specification

83C654

CMOS single-chip 8-bit microcontroller

1998 Jan 06

11

7. Pins of ports 1 , 2, and 3 source a transition current when they are being externally driven from 1 to 0. The transition current reaches its

to external bus capacitance discharging into the port 0 and port 2 pins when these pins make 1-to-0 transitions during bus operations. In the

worst cases (capacitive loading > 100pF), the noise pulse on the ALE pin may exceed 0.8V. In such cases, it may be desirable to qualify

ALE with a Schmitt Trigger, or use an address latch with a Schmitt Trigger STROBE input.

address bits are stabilizing.

40

30

20

10

0

04

8

12

16

(1) MAXIMUM OPERATING MODE: VDD = VDDmax

(2) MAXIMUM IDLE MODE: VDD = VDDmax

fXTAL1 (MHz)

IDD

(mA)

40

30

20

10

0

0

4

812

16

(2)

(1)

24

50

IDD

(mA)

fXTAL1 (MHz)

These values are valid within the specified

frequency range.

(1) MAXIMUM OPERATING MODE: VDD = VDDmax

(2) MAXIMUM IDLE MODE: VDD = VDDmax

These values are valid within the specified

frequency range.

(1)

(2)