Figure 15. Flash/EEPROM Serial Downloading
Figure 13. Programming the Flash/EEPROM Memory
+4.0V to 6.0V
+5V
AT89S52
AT89S8252
A0 - A7
VCC
VCC
ADDR.
P1
0000H/27FFH
PGM
DATA
P2.0 - P2.5
P0
A8 - A13
INSTRUCTION
INPUT
P1.5/MOSI
P1.6/MISO
P2.6
P2.7
P3.6
P3.7
ALE
PROG
SEE FLASH
PROGRAMMING
MODES TABLE
DATA OUTPUT
CLOCK IN
P1.7/SCK
XTAL2
XTAL2
EA
VPP
3-24 MHz
3-24 MHz
P3.4
RDY/
BSY
XTAL1
GND
RST
VIH
XTAL1
GND
RST
VIH
PSEN
Figure 14. Verifying the Flash/EEPROM Memory
+5V
AT89S8252
A0 - A7
VCC
ADDR.
P1
PGM DATA
(USE 10K
PULLUPS)
0000H/2FFFH
P0
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
28
AT89S8252
0401G–MICRO–3/06
ATMEL [ ATMEL ]
