AT89S4051 Atmel Corporation, AT89S4051 Datasheet - Page 32

• Manufacturer Part Number: AT89S4051
• Manufacturer: Atmel Corporation

Specifications of AT89S4051

• Flash (kbytes): 4 Kbytes
• Max. Operating Frequency: 24 MHz
• Cpu: 8051-12C
• Max I/o Pins: 15
• Uart: 1
• Sram (kbytes): 0.25
• Operating Voltage (vcc): 2.7 to 5.5
• Timers: 2
• Isp: SPI

33. In-System Programming (ISP) Specification
32
AT89S2051/S4051
Atmel’s AT89S2051/S4051 offers 2K/4K bytes of In-System Programmable Flash code memory.
In addition, the device contains a 32-byte User Signature Row and a 32-byte read-only Atmel
Signature Row.
Table 33-1.
Figure 33-1. ISP Programming Device Connections
Note:
AT89S2051
AT89S4051
Device #
1. SCK frequency should be less than (XTAL frequency)/8.
Memory Organization
Page Size
SERIAL IN
(MOSI)
32 bytes
32 bytes
SCK
(1)
# Pages
AT89S2051/S4051
P1.7
P1.5
XTAL1
GND
128
64
P1.6
RST
V
Address Range
CC
0000H - 07FFH
0000H - 0FFFH
2.7V to 5.5V
SERIAL OUT
(MISO)
V
CC
Page Range
00H - 3FH
00H - 7FH
3390E–MICRO–6/08