Figure 13. Programming the Flash Memory
Figure 14. Flash Serial Downloading
+5V
+4.0V to 6.0V
AT89S53
AT89S53
A0 - A7
VCC
VCC
ADDR.
P1
0000H/2FFFH
PGM
DATA
P2.0 - P2.5
P0
A8 - A13
INSTRUCTION
P1.5/MOSI
INPUT
P2.6
P2.7
P3.6
P3.7
ALE
PROG
P1.6/MISO
SEE FLASH
PROGRAMMING
MODES TABLE
DATA OUTPUT
P1.7/SCK
CLOCK IN
XTAL2
EA
VPP
XTAL2
3-24 Mhz
3-24 Mhz
XTAL1
GND
RST
VI H
XTAL1
GND
RST
VI H
PSEN
Figure 15. Verifying the Flash Memory
+5V
AT89S53
A0 - A7
VCC
P0
ADDR.
0000H/2FFFH
P1
PGM DATA
(USE 10K
PULLUPS)
P2.0 - P2.5
A8 - A13
P2.6
P2.7
ALE
EA
VI H
SEE FLASH
PROGRAMMING
MODES TABLE
P3.6
P3.7
VPP
XTAL2
3-24 Mhz
VI H
XTAL1
GND
RST
PSEN
AT89S53
4-238
ATMEL [ ATMEL ]
