AT89LS51 Atmel Corporation, AT89LS51 Datasheet - Page 17

• Manufacturer Part Number: AT89LS51
• Manufacturer: Atmel Corporation

Specifications of AT89LS51

• Flash (kbytes): 4 Kbytes
• Max. Operating Frequency: 16 MHz
• Cpu: 8051-12C
• Max I/o Pins: 32
• Uart: 1
• Sram (kbytes): 0.125
• Operating Voltage (vcc): 2.7 to 4.0
• Timers: 2
• Isp: SPI
• Watchdog: Yes

3053C–MICRO–6/08
Figure 17-1. Programming the Flash Memory (Parallel Mode)
Figure 17-2. Verifying the Flash Memory (Parallel Mode)
3 - 16 MHz
3 - 16 MHz
PROGRAMMING
MODES TABLE
PROGRAMMING
MODES TABLE
SEE FLASH
0000H/FFFH
0000H/FFFH
SEE FLASH
ADDR.
ADDR.
A8 - A11
A0 - A7
A8 - A11
A0 - A7
P1.0-P1.7
P2.0 - P2.3
P2.6
P2.7
P3.3
P3.6
P3.7
XTAL2
XTAL1
GND
P3.3
P1.0-P1.7
P2.0 - P2.3
P2.6
P2.7
P3.6
P3.7
XTAL 2
XTAL1
GND
AT89S51
AT89S51
PSEN
PSEN
P3.0
RST
ALE
V
RST
ALE
EA
P0
V
CC
EA
P0
CC
4.5V - 5.5V
4.5V - 5.5V
PGM DATA
(USE 10K
PULLUPS)
PGM
DATA
PROG
V /V
V
RDY/
BSY
V
IH
IH
V
IH
IH
PP
AT89LS51
17