IC80C54 Datasheet, PDF (12/22 Pages) Integrated Circuit Solution Inc – CMOS SINGLE CHIP 8-BIT MICROCONTROLLER

IC80C54
IC80C58
ROM Verification
The address of the program menory location to be read is
applied to Port 1 and pins P2.5-P2.0 (A14 is P3.4 for
IC80C58). The other pins should be held at the “Verify”
level are indicated in Figure 12. The contents of the ad-
dressed locations exits on Port 0. External pullups are re-
quired on Rort 0 for this operation. Figure 12 shows the
setup to verify the program memory.
A7-A0 P1
A12-A8 P2.4-P2.0
1
RST
1
EA
1
ALE
0
PSEN
0
P2.7
0
P2.6
XTAL1
4-6 MHz
XTAL2
GND
+ 5V
Vcc
10K x 8
P0
PGM
DATA
P2.5
A13
P3.4
P14
IC80C54 : A13 - A0
IC80C58 : A14 - A0
Figure 12. ROM Verification
12
Integrated Circuit Solution Inc.
MC003-0B