P87C660X2 PHILIPS [NXP Semiconductors], P87C660X2 Datasheet - Page 90

• Manufacturer Part Number: P87C660X2
• Description: 80C51 8-bit microcontroller family
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
2003 Oct 02
WRITE TO SBUF
INSTRUCTION
AC inputs during testing are driven at V
INPUT DATA
NOTE:
Timing measurements are made at V
OUTPUT DATA
80C51 8-bit microcontroller family
RAM, low voltage (2.7 to 5.5 V), low power, high speed (30/33
MHz), two 400KB I
CLEAR RI
V
CC
0.45V
CLOCK
–0.5
ALE
Figure 56. AC Testing Input/Output
0
2
C interfaces
t
QVXH
0.2V
0.2V
IH
CC
CC
CC
min for a logic ‘1’ and V
+0.9
–0.1
–0.5 for a logic ‘1’ and 0.45V for a logic ‘0’.
t
1
XHDV
0
t
XLXL
VALID
V
CC
0.45V
16 KB OTP/ROM, 512B
–0.5
t
XHQX
2
IL
max for a logic ‘0’.
Figure 54. Shift Register Mode Timing
VALID
1
Figure 55. External Clock Drive
0.2V
t
CHCL
SU00717
0.7V
t
CC
XHDX
CC
3
–0.1
VALID
2
90
t
CLCX
4
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
V
OH
t
LOAD
CLCL
VALID
/V
3
OL
t
level occurs. I
CHCX
t
V
V
CLCH
LOAD
LOAD
5
–0.1V
+0.1V
VALID
SU00009
4
OH
Figure 57. Float Waveform
/I
OL
20mA.
6
VALID
P8xC660X2/661X2
5
REFERENCE
TIMING
POINTS
7
VALID
6
Product data
8
V
V
VALID
SET TI
SET RI
SU00027
OH
OL
7
SU00718
+0.1V
–0.1V