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AT89S4D12-12RI Datasheet

  • AT89S4D12-12RI

  • 8-Bit Microcontroller with 132K Bytes Flash Data Memory

  • 123.55KB

  • 13頁(yè)

  • ATMEL   ATMEL

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AT89S4D12
Features
鈥?/div>
Compatible with MCS-51
鈩?/div>
Products
鈥?/div>
128K Bytes of In-System Reprogrammable Flash data memory and 4K Bytes of
Downloadable Flash Program Memory
鈥?Endurance: 1,000 Write/Erase Cycles per Sector
鈥?Data Retention: 10 Years
Sector Programming: 128 Bytes/Sector
Single 3.3V
鹵
10% Supply
On-Chip 12 MHz oscillator
Two-Level Program Memory Lock
256-Bytes Internal RAM
5 Programmable I/O Lines
Serial Peripheral Interface (SPI) Channel
Serial Program Downloading
Dual Data Pointer Registers
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Description
The AT89S4D12 is a low-voltage, highly integrated CMOS 8-bit microcomputer with
4K bytes of downloadable Flash program memory and 128K bytes of in-system repro-
grammable Flash data memory. The device is manufactured using Atmel鈥檚 high den-
sity Flash memory technology and is compatible with the industry-standard MCS-51
鈩?/div>
instruction set.
The 128K bytes of on-chip Flash data memory are accessed as two 64K byte blocks.
Bit 0 at SFR location 96H is used to select the active block. The MOVX instruction is
used to read and write the data memory. Both the program and data memory arrays
can be programmed by an external programmer.
The downloadable Flash can be changed one page (128 bytes) at a time and is
accessible through the SPI serial peripheral interface port. Holding RESET active
forces the SPI bus into a slave input mode and allows the program memory to be writ-
ten-from or read-to unless Lock Bit 2 has been activated.
The functional operations of the 128K bytes Flash data memory are equivalent to
those on the AT29LV010A 1M Bit Flash memory device.
8-Bit
Microcontroller
with
132K Bytes
Flash Data
Memory
AT89S4D12
Pin Configurations
SOIC Top View
GND
TEST1
RESET
SDI/P1.1
SDO/P1.0
TEST2
NC
NC
NC
NC
NC
NC
NC
NC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28
27
26
25
24
23
22
21
20
19
18
17
16
15
VCC
P1.2/DTR
P1.3/SCK
P1.4/DSR
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
PLCC Top View
P1.1/SDI
RESET
TEST1
GND
VCC
P1.2/DTR
P1.3/SCK
NC
NC
NC
NC
NC
NC
NC
14
15
16
17
18
19
20
P1.0/SDO
TEST2
NC
NC
NC
NC
NC
NC
NC
5
6
7
8
9
10
11
12
13
4
3
2
1
32
31
30
29
28
27
26
25
24
23
22
21
P1.4/DSR
NC
NC
NC
NC
NC
NC
NC
NC
0921A-A鈥?2/97
4-281

AT89S4D12-12RI 產(chǎn)品屬性

  • Atmel

  • 8-bit Microcontrollers (MCU)

  • 8051

  • 8 bit

  • 12 MHz

  • 4 KB

  • 256 B

  • No

  • SOIC-28

  • SMD/SMT

  • 2.4 mm

  • SPI

  • 18.5 mm

  • + 85 C

  • - 40 C

  • 5

  • No

  • Flash

  • 12

  • 3.63 V

  • 2.97 V

  • 8.79 mm

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