- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄3831 > AT87C52X2-3CSUL (Atmel)IC 8051 MCU 8K OTP 30MHZ 40DIP PDF資料下載
參數(shù)資料
| 型號： | AT87C52X2-3CSUL |
| 廠商： | Atmel |
| 文件頁數(shù)： | 26/55頁 |
| 文件大小： | 0K |
| 描述： | IC 8051 MCU 8K OTP 30MHZ 40DIP |
| 標(biāo)準(zhǔn)包裝： | 216 |
| 系列： | 87C |
| 核心處理器： | 8051 |
| 芯體尺寸： | 8-位 |
| 速度： | 30/20MHz |
| 連通性： | UART/USART |
| 外圍設(shè)備： | POR |
| 輸入/輸出數(shù)： | 32 |
| 程序存儲器容量： | 8KB（8K x 8） |
| 程序存儲器類型： | OTP |
| RAM 容量： | 256 x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 2.7 V ~ 5.5 V |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 40-DIP（0.600"，15.24mm） |
| 包裝： | 管件 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁當(dāng)前第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁
32
TS8xCx2X2
4184I–8051–02/08
EPROM Structure
The TS87C52X2 is divided in two different arrays:
the code array: 8 Kbytes
the encryption array: 64 bytes
In addition a third non programmable array is implemented:
the signature array: 4 bytes
EPROM Lock System
The program Lock system, when programmed, protects the on-chip program against
software piracy.
Encryption Array
Within the EPROM array are 64 bytes of encryption array that are initially unpro-
grammed (all FF’s). Every time a byte is addressed during program verify, 6 address
lines are used to select a byte of the encryption array. This byte is then exclusive-
NOR’ed (XNOR) with the code byte, creating an encrypted verify byte. The algorithm,
with the encryption array in the unprogrammed state, will return the code in its original,
unmodified form.
When using the encryption array, one important factor needs to be considered. If a byte
has the value FFh, verifying the byte will produce the encryption byte value. If a large
block (>64 bytes) of code is left unprogrammed, a verification routine will display the
content of the encryption array. For this reason all the unused code bytes should be pro-
grammed with random values. This will ensure program protection.
Program Lock Bits
The three lock bits, when programmed according to Table 1., will provide different level
of protection for the on-chip code and data.
U: unprogrammed
P: programmed
WARNING: Security level 2 and 3 should only be programmed after EPROM and Core
verification.
Signature Bytes
The TS80/87C52X2 contains 4 factory programmed signatures bytes. To read these
bytes, perform the process described in section 9.
EPROM Programming
Set-up modes
In order to program and verify the EPROM or to read the signature bytes, the
TS87C52X2 is placed in specific set-up modes (See Figure 11.).
Program Lock Bits
Protection Description
Security
level
LB1
LB2
LB3
1
U
No program lock features enabled. Code verify will still be
encrypted by the encryption array if programmed. MOVC
instruction executed from external program memory returns non
encrypted data.
2
P
U
MOVC instruction executed from external program memory are
disabled from fetching code bytes from internal memory, EA is
sampled and latched on reset, and further programming of the
EPROM is disabled.
3
U
P
U
Same as 2, also verify is disabled.
4
U
P
Same as 3, also external execution is disabled.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AT87C51RD2-SLSUM | IC 8051 MCU 64K OTP 40MHZ 44PLCC |
| AT87C51RD2-SLSUL | IC 8051 MCU 64K OTP 30MHZ 44PLCC |
| 201532-4 | CONN HOUSING RECEPT 104POS BLACK |
| AT87C54X2-SLSUL | IC 8051 MCU 16K EPROM 44PLCC |
| AT87C54X2-RLTUM | IC 8051 MCU 16K EPROM 44VQFP |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AT87C52X2-3CSUM | 功能描述:8位微控制器 -MCU 256B RAM 60MHz 2.7V-5.5V RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| AT87C52X2-3CSUV | 功能描述:8位微控制器 -MCU Microcontroller RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| AT87C52X2-RLRUM | 功能描述:8位微控制器 -MCU 0.5um RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| AT87C52X2-RLTUL | 功能描述:8位微控制器 -MCU C72X2C52 0.5m OTP RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| AT87C52X2-RLTUM | 功能描述:8位微控制器 -MCU C72X2 C52 0.5 m X 2 OTP 0.5 NV RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。