17
AT89S51
2487A–10/01
Figure 7. Flash Memory Serial Downloading
Flash Programming and Verification Waveforms – Serial Mode
Figure 8. Serial Programming Waveforms
P1.7/SCK
DATA OUTPUT
INSTRUCTION
INPUT
CLOCK IN
3-33 MHz
P1.5/MOSI
V
IH
XTAL2
RSTXTAL1
GND
V
CC
AT89S51
P1.6/MISO
V
CC
765432 10
