Rainbow Electronics АТ89С51 - Manual (Page 15)

15
AT89S51
2487A–10/01
Figure 4. Programming the Flash Memory (Parallel Mode)
Figure 5. Verifying the Flash Memory (Parallel Mode)
P1.0-P1.7
P2.6
P3.6
P2.0 - P2.3
A0 - A7
ADDR.
0000H/FFFH
SEE FLASH
PROGRAMMING
MODES TABLE
3-33 MHz
P0
V
P2.7
PGM
DATA
PROG
V /V
IH PP
V
IH
ALE
P3.7
XTAL2 EA
RST
PSEN
XTAL1
GND
V
CC
AT89S51
P3.3
P3.0
RDY/
BSY
A8 - A11
CC
P1.0-P1.7
P2.6
P3.6
P2.0 - P2.3
A0 - A7
ADDR.
0000H/FFFH
SEE FLASH
PROGRAMMING
MODES TABLE
3-33 MHz
P0
P2.7
PGM DATA
(USE 10K
PULLUPS)
V
IH
V
IH
ALE
P3.7
XTAL 2 EA
RST
PSEN
XTAL1
GND
V
CC
AT89S51
P3.3
A8 - A11
V
CC