Rainbow Electronics AT89S52 - Manual (Page 20)

AT89S52
20
Figure 16. Flash Memory Serial Downloading
Flash Programming and Verification Waveforms – Serial Mode
Figure 17. Serial Programming Waveforms
P1.7/SCK
DATA OUTPUT
INSTRUCTION
INPUT
CLOCK IN
3-33 MHz
P1.5/MOSI
V
IH
XTAL2
RST XTAL1
GND
V
CC
AT89S52
P1.6/MISO
V
CC
7 6 5 4 3 2 1 0