參數(shù)資料
型號(hào)： COP8CBR9LVA8
廠商： National Semiconductor
文件頁(yè)數(shù)： 29/111頁(yè)
文件大?。?/td> 0K
描述： IC MCU EEPROM 8BIT 32K 68PLCC
標(biāo)準(zhǔn)包裝： 18
系列： COP8™ 8C
核心處理器： COP8
芯體尺寸： 8-位
速度： 20MHz
連通性： Microwire/Plus（SPI），UART/USART
外圍設(shè)備： 欠壓檢測(cè)/復(fù)位，POR，PWM，WDT
輸入/輸出數(shù)： 59
程序存儲(chǔ)器容量： 32KB（32K x 8）
程序存儲(chǔ)器類型： 閃存
RAM 容量： 1K x 8
電壓 - 電源 (Vcc/Vdd)： 2.7 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 16x10b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 68-LCC（J 形引線）
包裝： 管件
其它名稱： *COP8CBR9LVA8
SNOS535I – OCTOBER 2000 – REVISED MARCH 2013
Figure 5-1. RAM Organization
5.4.1
Virtual EEPROM
The Flash memory and the User ISP functions (see Section 5.7), provide the user with the capability to
use the flash program memory to back up user defined sections of RAM. This effectively provides the user
with the same nonvolatile data storage as EEPROM. Management, and even the amount of memory
used, are the responsibility of the user, however the flash memory read and write functions have been
provided in the boot ROM.
One typical method of using the Virtual EEPROM feature would be for the user to copy the data to RAM
during system initialization, periodically, and if necessary, erase the page of Flash and copy the contents
of the RAM back to the Flash.
5.5
OPTION REGISTER
The Option register, located at address 0x7FFF in the Flash Program Memory, is used to configure the
user selectable security, WATCHDOG, and HALT options. The register can be programmed only in
external Flash Memory programming or ISP Programming modes. Therefore, the register must be
programmed at the same time as the program memory. The contents of the Option register shipped from
the factory read 00 Hex.
The format of the Option register is as follows:
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
WATCH
Reserved
SECURITY
Reserved
HALT
FLEX
DOG
Bits 7, 6
These bits are reserved and must be 0.
Bit 5
= 1
Security enabled. Flash Memory read and write are not allowed except in User ISP/Virtual E2
commands. Mass Erase is allowed.
= 0
Security disabled. Flash Memory read and write are allowed.
Bits 4, 3
These bits are reserved and must be 0.
24
Functional Description
Copyright 2000–2013, Texas Instruments Incorporated
Product Folder Links: COP8CBR9 COP8CCR9 COP8CDR9
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COP8CCE9HVA7/NOPB 功能描述:8位微控制器 -MCU 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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