80C31X2 Datasheet, PDF (46/62 Pages) NXP Semiconductors – 80C51 8-bit microcontroller family 4K/8K/16K/32K ROM/OTP 128B/256B RAM low voltage 2.7 to 5.5 V, low power, high speed 30/33 MHz

Philips Semiconductors
80C51 8-bit microcontroller family
4K/8K/16K/32K ROM/OTP, low voltage (2.7 to 5.5 V),
low power, high speed (30/33 MHz)
Product data
P80C3xX2; P80C5xX2;
P87C5xX2
V_CC–0.5
0.45V
0.2V_CC+0.9
0.2V_CC–0.1
NOTE:
AC inputs during testing are driven at V_CC –0.5 for a logic ‘1’ and 0.45V for a logic ‘0’.
Timing measurements are made at V_IH min for a logic ‘1’ and V_IL max for a logic ‘0’.
Figure 32. AC Testing Input/Output
SU00717
V_LOAD
V_LOAD+0.1V
V_LOAD–0.1V
TIMING
REFERENCE
POINTS
V_OH–0.1V
V_OL+0.1V
NOTE:
For timing purposes, a port is no longer floating when a 100mV change from
load voltage occurs, and begins to float when a 100mV change from the loaded
V_OH/V_OL level occurs. I_OH/I_OL ≥ ±20mA.
SU00718
Figure 33. Float Waveform
35
MAX ACTIVE MODE
I_CCMAX = 0.9 FREQ. + 1.0
30
25
20
15
TYP ACTIVE MODE
10
MAX IDLE MODE
5
TYP IDLE MODE
4
8
12 16 20 24 28 32 36
FREQ AT XTAL1 (MHz)
SU01486
Figure 34. I_CC vs. FREQ for 12-clock operation
Valid only within frequency specifications of the specified operating voltage
2003 Jan 24
46