Datasheet

3286P–MICRO–3/10
Fuse3 (User Row Access Fuse): This fuse enables/disables writing to the programmable user row.
Fuse4 (Clock Selection Fuse): This fuse selects between an external clock source and a quartz crystal as the clock input.
Programming the Flash/EEPROM Memory (Parallel Mode)
Figure 25-2. Verifying the Flash/EEPROM Memory (Parallel Mode)
P1
P3.3
P3.5
P2.0 - P2.5
A0 - A7
ADDR.
0000H/37FFH
SEE FLASH
PROGRAMMING
MODES TABLE
3-24 MHz
A8 - A13
P0
P3.4
PGM
DATA
PROG
V
PP
V
IH
ALE
P3.6
P3.7
XTAL2 EA
RST
PSEN
XTAL1
GND
V
CC
AT89S8253
P3.0 RDY/BSY
(USE 10K
PULLUP)
V
CC
P1
P3.3
P3.5
P2.0 - P2.5
A0 - A7
ADDR.
0000H/37FFH
SEE FLASH
PROGRAMMING
MODES TABLE
A8 - A13
P0
P3.4
PGM
DATA
PROG
V
PP
V
IH
ALE
P3.6
P3.7
EA
RST
PSEN
XTAL1
3-24 MHz
EXTERNAL
CLOCK
GND
V
CC
AT89S8253
P3.0 RDY/BSY
(USE 10K
PULLUP)
V
CC
Oscillator Bypass
Fuse (Fuse4) Off
Oscillator Bypass
Fuse (Fuse4) On
P1
P3.3
P3.5
P2.0 - P2.5
A0-A7
ADDR.
0000H/37FFH
SEE FLASH
PROGRAMMING
MODES TABLE
3-24 Mhz
A8 - A13
P0
V
CC
P3.4
PGM DATA
(USE 10K
PULLUPS)
V
I H
V
I H
ALE
P3.6
P3.7
XTAL2 EA
RST
PSEN
XTAL1
GND
V
CC
AT89S8253
V
PP
P1
P3.3
P3.5
P2.0 - P2.5
A0 - A7
ADDR.
0000H/37FFH
SEE FLASH
PROGRAMMING
MODES TABLE
A8 - A13
P0
V
CC
P3.4
PGM DATA
(USE 10K
PULLUPS)
V
I H
V
I H
ALE
P3.6
P3.7
EA
RST
PSEN
XTAL1
GND
V
CC
AT89S8253
V
PP
3-24 MHz
EXTERNAL
CLOCK
Oscillator Bypass
Fuse (Fuse4) Off
Oscillator Bypass
Fuse (Fuse4) On