AT89S4D12
器件描述：8-Bit Microcontroller with 132K Bytes Flash Data Memory
器件厂商：ATMEL [ATMEL Corporation]
文件大小：120.37KB，共13页
Sponsor by e络盟器件资料摘要：
AT89S4D12
4-281
Features
• Compatible with MCS-51
™
Products
• 128K Bytes of In-System Reprogrammable Flash data memory and 4K Bytes of
Downloadable Flash Program Memory
– Endurance: 1,000 Write/Erase Cycles per Sector
– Data Retention: 10 Years
• Sector Programming: 128 Bytes/Sector
• Single 3.3V ± 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
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’s high den-
sity Flash memory technology and is compatible with the industry-standard MCS-51
™
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.
0921A-A–12/97
8-Bit
Microcontroller
with
132K Bytes
Flash Data
Memory
AT89S4D12
SOIC Top View
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
GND
TEST1
RESET
SDI/P1.1
SDO/P1.0
TEST2
NC
NC
NC
NC
NC
NC
NC
NC
VCC
P1.2/DTR
P1.3/SCK
P1.4/DSR
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
PLCC Top View
5
6
7
8
9
10
11
12
13
29
28
27
26
25
24
23
22
21
P1.0/SDO
TEST2
NC
NC
NC
NC
NC
NC
NC
P1.4/DSR
NC
NC
NC
NC
NC
NC
NC
NC
4 3 2 1
32 31 30
14 15 16 17 18 19 20
NC NC NC NC NC NC NC
P1.1/SDI RESET TEST1 GND VCC P1.2/DTR P1.3/SCK
Pin Configurations
4-281
Features
• Compatible with MCS-51
™
Products
• 128K Bytes of In-System Reprogrammable Flash data memory and 4K Bytes of
Downloadable Flash Program Memory
– Endurance: 1,000 Write/Erase Cycles per Sector
– Data Retention: 10 Years
• Sector Programming: 128 Bytes/Sector
• Single 3.3V ± 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
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’s high den-
sity Flash memory technology and is compatible with the industry-standard MCS-51
™
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.
0921A-A–12/97
8-Bit
Microcontroller
with
132K Bytes
Flash Data
Memory
AT89S4D12
SOIC Top View
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
GND
TEST1
RESET
SDI/P1.1
SDO/P1.0
TEST2
NC
NC
NC
NC
NC
NC
NC
NC
VCC
P1.2/DTR
P1.3/SCK
P1.4/DSR
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
PLCC Top View
5
6
7
8
9
10
11
12
13
29
28
27
26
25
24
23
22
21
P1.0/SDO
TEST2
NC
NC
NC
NC
NC
NC
NC
P1.4/DSR
NC
NC
NC
NC
NC
NC
NC
NC
4 3 2 1
32 31 30
14 15 16 17 18 19 20
NC NC NC NC NC NC NC
P1.1/SDI RESET TEST1 GND VCC P1.2/DTR P1.3/SCK
Pin Configurations