參數(shù)資料
型號: PIC16LF72-I/ML
廠商: Microchip Technology
文件頁數(shù): 5/136頁
文件大?。?/td> 0K
描述: IC PIC MCU FLASH 2KX14 28QFN
產品培訓模塊: Asynchronous Stimulus
8-bit PIC® Microcontroller Portfolio
標準包裝: 61
系列: PIC® 16F
核心處理器: PIC
芯體尺寸: 8-位
速度: 20MHz
連通性: I²C,SPI
外圍設備: 欠壓檢測/復位,POR,PWM,WDT
輸入/輸出數(shù): 22
程序存儲器容量: 3.5KB(2K x 14)
程序存儲器類型: 閃存
RAM 容量: 128 x 8
電壓 - 電源 (Vcc/Vdd): 2 V ~ 5.5 V
數(shù)據(jù)轉換器: A/D 5x8b
振蕩器型: 外部
工作溫度: -40°C ~ 85°C
封裝/外殼: 28-VQFN 裸露焊盤
包裝: 管件
產品目錄頁面: 639 (CN2011-ZH PDF)
102
2535J–AVR–08/10
ATtiny13
17. Memory Programming
This section describes how ATtiny13 memories can be programmed.
17.1 Program And Data Memory Lock Bits
ATtiny13 provides two lock bits which can be left unprogrammed (“1”) or can be programmed
(“0”) to obtain the additional security listed in Table 17-2 on page 102. The lock bits can be
erased to “1” with the Chip Erase command, only.
Program memory can be read out via the debugWIRE interface when the DWEN fuse is pro-
grammed, even if the lock bits are set. Thus, when lock bit security is required, debugWIRE
should always be disabled by clearing the DWEN fuse.
Note:
1. “1” means unprogrammed, “0” means programmed
Notes: 1. Program fuse bits before lock bits. See section “Fuse Bytes” on page 103.
2. “1” means unprogrammed, “0” means programmed
Table 17-1.
Lock Bit Byte
Lock Bit Byte
Bit No
Description
Default Value (1)
7
1 (unprogrammed)
6
1 (unprogrammed)
5
1 (unprogrammed)
4
1 (unprogrammed)
3
1 (unprogrammed)
2
1 (unprogrammed)
LB2
1
Lock bit
1 (unprogrammed)
LB1
0
Lock bit
1 (unprogrammed)
Table 17-2.
Lock Bit Protection Modes
Memory Lock Bits (1) (2)
Protection Type
LB Mode
LB2
LB1
1
No memory lock features enabled.
21
0
Further programming of the Flash and EEPROM is disabled in
High-voltage and Serial Programming mode. Fuse bits are
locked in both Serial and High-voltage Programming mode.
debugWire is disabled.
30
0
Further programming and verification of the Flash and
EEPROM is disabled in High-voltage and Serial Programming
mode. Fuse bits are locked in both Serial and High-voltage
Programming mode. debugWire is disabled.
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