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參數(shù)資料
| 型號： | P87C51RB2FN |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 80C51 8-bit microcontroller family |
| 中文描述： | 8-BIT, OTPROM, 33 MHz, MICROCONTROLLER, PDIP40 |
| 封裝： | 0.600 INCH, PLASTIC, SOT-129-1, DIP-40 |
| 文件頁數(shù)： | 17/34頁 |
| 文件大小： | 394K |
| 代理商： | P87C51RB2FN |
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2001 Apr 06
17
Philips Semiconductors
Preliminary specification
P87C51MB2/P87C51MC2
80C51 8-bit microcontroller family with extended memory
64KB/96KB OTP with 2KB/3KB RAM
SECURITY BITS
The P87C51Mx2 has security bits to protect users’ firmware codes. With none of the security bits programmed, the code in the
program memory can be verified. With only security bit 1 (see Table 6) is programmed, MOVC instructions executed from
external program memory are disabled from fetching code bytes from the internal memory. EA is latched on Reset and all further
programming of EPROM is disabled. When security bits 1 and 2 are programmed, in addition to the above, verify mode is
disabled. When all three security bits are programmed, all of the conditions above apply and all external program memory
execution is disabled.
Security Bits
1,2
Bit 1
U
Protection Description
No program security features enabled. EEPROM is programmable and verifiable.
MOVC instructions 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.
Same as 2, also verification is disabled.
Same as 3, external execution is disabled.
Bit 2
U
Bit 3
U
1
2
P
U
U
3
4
P
P
P
P
U
P
Notes:
1. P - programmed. U- unprogrammed.
2. Any other combination of security bits is not defined.
Table 6: EPROM Security Bits
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| P87C51RC2 | 80C51 8-bit microcontroller family |
| P87C51FB-IA | 80C51 8-bit microcontroller family 8K.64K/256.1K OTP/ROM/ROMless, low voltage 2.7V.5.5V, low power, high speed 33 MHz |
| P87C51FB-IB | 80C51 8-bit microcontroller family 8K.64K/256.1K OTP/ROM/ROMless, low voltage 2.7V.5.5V, low power, high speed 33 MHz |
| P87C51FB-IN | 80C51 8-bit microcontroller family 8K.64K/256.1K OTP/ROM/ROMless, low voltage 2.7V.5.5V, low power, high speed 33 MHz |
| P87C51FC-IA | 80C51 8-bit microcontroller family 8K.64K/256.1K OTP/ROM/ROMless, low voltage 2.7V.5.5V, low power, high speed 33 MHz |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| P87C51RB4A | 制造商:NXP Semiconductors 功能描述:MCU 8-bit 8XC51 80C51 CISC 16KB EPROM 3.3V/5V 44-Pin PLCC |
| P87C51RC+4A | 制造商:NXP Semiconductors 功能描述:IC 8BIT MCU OTP 32K 87C51 PLCC44 |
| P87C51RC+4A,512 | 功能描述:8位微控制器 -MCU PREFERRED PART P87C51RC2FA 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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 |
| P87C51RC+4A | 制造商:NXP Semiconductors 功能描述:IC 8BIT MCU OTP 32K 87C51 PLCC44 |
| P87C51RC+4B | 功能描述:8位微控制器 -MCU PREF PT P87C51RC2BBD 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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 |
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