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參數(shù)資料
| 型號(hào)： | W78IRD2 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8-BIT MICROCONTROLLER |
| 中文描述： | 8位微控制器 |
| 文件頁數(shù)： | 59/76頁 |
| 文件大?。?/td> | 646K |
| 代理商： | W78IRD2 |
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W78IRD2/W78IRD2A
Publication Release Date: February 14, 2007
- 59 -
Revision A9
17. OPTION BITS REGISTER
In the on-chip Flash EPROM writer programming mode mode, the flash EPROM can be programmed
and verified repeatedly. Until the code is ready, it can be protected by properly setting option bits.
Option bits control the initial configuration of W78IRD2, including code protection, system clock mode
selection (6T/12T), H/W reboot mode selection and oscillator control.
Lock bit
This bit is used to protect the code in the W78IRD2. It may be set after the programmer finishes
programming and verifies the sequence. Once this bit is set to logic-0, both the Flash EPROM data
and Option Bits Register cannot be accessed again.
MOVC Inhibit
This bit is used to restrict the accessible region of the MOVC instruction. It can prevent a MOVC
instruction in external program memory from reading the internal program code. When this bit is set to
logic-0, a MOVC instruction in external program memory space can only access code in external
memory, not in internal memory. A MOVC instruction in internal program memory can always access
both internal and external memory. If this bit is logic-1, there are no restrictions on MOVC.
Encryption
This bit is used to enable and disable the encryption logic for code protection. Once encryption is
enabled, the data presented on port 0 is encoded via encryption logic. This bit can be reset only by
erasing the whole chip.
Oscillator Control
The gain of the on-chip oscillator amplifier can be reduced by bit B7 in the option bits register. If bit 7
is set to zero, the gain is cut in half.
According the circuit in
Figure 20-1
, the values of R, C1 and C2 may need some adjustment when
running at lower gain. Furthermore, reducing the gain by one-half may improperly affect an external
crystal running at frequencies above 20 MHz.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W78IRD2A | 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-BIT MICROCONTROLLER |
| W78IRD2A25DL | 功能描述:IC MCU 8-BIT 64K FLASH 40-DIP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:W78 標(biāo)準(zhǔn)包裝:300 系列:78K0R/Ix3 核心處理器:78K/0R 芯體尺寸:16-位 速度:40MHz 連通性:3 線 SIO，I²C，LIN，UART/USART 外圍設(shè)備:DMA，LVD，POR，PWM，WDT 輸入/輸出數(shù):27 程序存儲(chǔ)器容量:16KB（16K x 8） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:- 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 8x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:38-SSOP 包裝:托盤 |
| W78IRD2A25PL | 功能描述:IC MCU 8-BIT 64K FLASH 44-PLCC RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:W78 標(biāo)準(zhǔn)包裝:300 系列:78K0R/Ix3 核心處理器:78K/0R 芯體尺寸:16-位 速度:40MHz 連通性:3 線 SIO，I²C，LIN，UART/USART 外圍設(shè)備:DMA，LVD，POR，PWM，WDT 輸入/輸出數(shù):27 程序存儲(chǔ)器容量:16KB（16K x 8） 程序存儲(chǔ)器類型:閃存 EEPROM 大小:- 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 8x10b 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:38-SSOP 包裝:托盤 |
| W78J_1TG WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| W78J_2G WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
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