AT89C2051X2 ATMEL [ATMEL Corporation], AT89C2051X2 Datasheet - Page 9

• Manufacturer Part Number: AT89C2051X2
• Description: 8-bit Microcontroller with 2K Bytes Flash
• Manufacturer: ATMEL [ATMEL Corporation]

Flash Programming Modes
Notes:
3285B–MICRO–10/03
Mode
Write Code Data
Read Code Data
Write Lock
Chip Erase
Read Signature Byte
1. The internal memory address counter is reset to 000H on the rising edge of RST and is advanced by a positive pulse at
2. Chip Erase requires a 10 ms PROG pulse.
3. P3.1 is pulled Low during programming to indicate RDY/BSY.
XTAL1 pin.
(1)(3)
(1)
Bit - 1
Bit - 2
RST/VPP
12V
12V
12V
12V
H
H
P3.2/PROG
H
H
(2)
P3.3
H
H
H
L
L
L
P3.4
AT89C2051x2
H
H
H
L
L
L
P3.5
H
H
H
L
L
L
P3.7
H
H
H
L
L
L
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