參數(shù)資料
型號(hào)： DS87C520-QNL/T&R
廠商： Maxim Integrated Products
文件頁(yè)數(shù)： 19/43頁(yè)
文件大?。?/td> 0K
描述： IC MCU EPROM/ROM 33MH IND 44PLCC
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 500
系列： 87C
核心處理器： 8051
芯體尺寸： 8-位
速度： 33MHz
連通性： EBI/EMI，SIO，UART/USART
外圍設(shè)備： 電源故障復(fù)位，WDT
輸入/輸出數(shù)： 32
程序存儲(chǔ)器容量： 16KB（16K x 8）
程序存儲(chǔ)器類型： OTP
RAM 容量： 1K x 8
電壓 - 電源 (Vcc/Vdd)： 4.5 V ~ 5.5 V
振蕩器型： 外部
工作溫度： -40°C ~ 85°C
封裝/外殼： 44-LCC（J 形引線）
包裝： 帶卷 (TR)
DS87C520/DS83C520 EPROM/ROM High-Speed Microcontrollers
26 of 43
Table 9. EPROM Programming Modes
MODE
RST
PSEN
ALE/
PROG
EA/VPP
P2.6
P2.7
P3.3
P3.6
P3.7
Program Code Data
H
L
PL
12.75V
L
H
Verify Code Data
H
L
H
L
H
Program Encryption Array
Address 0-3Fh
H
L
PL
12.75V
L
H
L
H
LB1
H
L
PL
12.75V
H
LB2
H
L
PL
12.75V
H
L
Program Lock Bits
LB3
H
L
PL
12.75V
H
L
H
L
Program Option Register
Address FCh
H
L
PL
12.75V
L
H
L
Read Signature or Option
Registers 30, 31, 60 FCh
H
L
H
L
Table 10. DS87C520 EPROM Lock Bits
LOCK BITS
LEVEL
LB1
LB2
LB3
PROTECTION
1
U
No program lock. Encrypted verify if encryption table was
programmed.
2
P
U
Prevent MOVC instructions in external memory from reading
program bytes in internal memory.
EA is sampled and latched on
reset. Allow no further programming of EPROM.
3
P
U
Level 2 plus no verify operation. Also, prevent MOVX
instructions in external memory from reading SRAM (MOVX) in
internal memory.
4
P
Level 3 plus no external execution.
SECURITY OPTIONS
The DS87C520 employs a standard three-level lock that restricts viewing of the EPROM contents. A 64-
byte Encryption Array allows the authorized user to verify memory by presenting the data in encrypted
form.
Lock Bits
The security lock consists of three lock bits. These bits select a total of four levels of security. Higher
levels provide increasing security but also limit application flexibility. Table 10 shows the security
settings. Note that the programmer cannot directly read the state of the security lock. User software has
access to this information as described in the Memory section.
相關(guān)PDF資料
PDF描述
DS87C520-QNL IC MCU EPROM/ROM 33MH IND 44PLCC
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS87C520-WCL 功能描述:8位微控制器 -MCU EPROM/ROM High-Speed 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
DS87C530 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:EPROM MICRO WITH REAL TIME CLOCK
DS87C530_05 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:EPROM/ROM Microcontrollers with Real-Time Clock
DS87C530_1 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:EPROM/ROM Micro with Real Time Clock
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