Philips Semiconductors
Preliminary specification
80C51 8-bit microcontroller
8K/256 OTP, 8 channel 10 bit A/D, I2C, PWM,
capture/compare, high I/O, low voltage (2.7V–5.5V), low power
P87C552
20
16
12
MAXIMUM ACTIVE MODE
I
mA
DD
8
4
0
TYPICAL ACTIVE MODE
MAXIMUM IDLE MODE
TYPICAL IDLE MODE
0
4
8
12
16
f (MHz)
SU01116
Figure 56. 16MHz Version Supply Current (I ) as a Function of Frequency at XTAL1 (f
)
DD
OSC
V
V
DD
DD
I
DD
P1.6
P1.7
V
DD
P0
V
V
DD
DD
RST
EA
STADC
EW
(NC)
XTAL2
XTAL1
CLOCK SIGNAL
AV
SS
V
SS
AV
ref–
SU00218
Figure 57. I Test Condition, Active Mode
DD
1
All other pins are disconnected
1. Active Mode:
a. The following pins must be forced to V : EA, RST, Port 0, and EW.
DD
b. The following pins must be forced to V : STADC, AV , and AV .
ref–
SS
ss
c. Ports 1.6 and 1.7 should be connected to V through resistors of sufficiently high value such that the sink current into these pins
DD
cannot exceed the I
spec of these pins.
OL1
d. The following pins must be disconnected: XTAL2 and all pins not specified above.
70
1999 Mar 30
NXP [ NXP ]
