Datasheet

43
3286P–MICRO–3/10
AT89S8253
Figure 25-3. Flash/EEPROM Serial Downloading
P1.7/SCK
DATA OUTPUT
INSTRUCTION
INPUT
CLOCK IN
3-24 MHz
2.7V to 5.5V
P1.5/MOSI
V
IH
XTAL2
RSTXTAL1
GND
V
CC
AT89S8253
P1.6/MISO
P1.7/SCK
DATA OUTPUT
INSTRUCTION
INPUT
CLOCK IN
2.7V to 5.5V
P1.5/MOSI
V
IH
RSTXTAL1
GND
V
CC
AT89S8253
P1.6/MISO
3-24 MHz
EXTERNAL
CLOCK
Oscillator Bypass
Fuse (Fuse4) Off
Oscillator Bypass
Fuse (Fuse4) On