AT89S51-33AC ATMEL [ATMEL Corporation], AT89S51-33AC Datasheet - Page 19

• Manufacturer Part Number: AT89S51-33AC
• Description: 8-bit Microcontroller with 4K Bytes In-System Programmable Flash
• Manufacturer: ATMEL [ATMEL Corporation]

Figure 18-2. Flash Memory Serial Downloading
19. Flash Programming and Verification Waveforms – Serial Mode
Figure 19-1. Serial Programming Waveforms
2487C–MICRO–03/05
3-33 MHz
DATA OUTPUT
INSTRUCTION
7
CLOCK IN
INPUT
6
5
P1.5/MOSI
P1.6/MISO
P1.7/SCK
XTAL2
XTAL1
GND
AT89S51
4
RST
V
CC
3
V
CC
2
V
IH
1
0
AT89S51
19