19
2487D–MICRO–6/08
AT89S51
Figure 18-2. Flash Memory Serial Downloading
19. Flash Programming and Verification Waveforms – Serial Mode
Figure 19-1. 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
