IC80C51 Datasheet, PDF (35/44 Pages) Integrated Circuit Solution Inc – CMOS SINGLE CHIP 8-BIT MICROCONTROLLER

IC80C51
IC80C31
ROM Verification
The address of the program menory location to be read is
applied to Port 1 and pins P2.3-P2.0. The other pins should
be held at the “Verify” level . The contents of the addressed
locations will be emitted on Port 0. External pullups are
required on Rort 0 for this operation. Figure 23 shows the
setup to verify the program memory.
A7-A0
P1
A11-A8
1
1
1
0
0
0
4-6 MHz
P2.3-P2.0
RST
EA
ALE
PSEN
P2.7
P2.6
XTAL1
XTAL2
GND
+ 5V
Vcc
10K x 8
P0
PGM
DATA
Figure 23. ROM Verification
Integrated Circuit Solution Inc.
35
MC001-0B