參數(shù)資料
型號(hào): R5F21257SDFP
元件分類: 微控制器/微處理器
英文描述: 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP52
封裝: 10 X 10 MM, 0.65 MM PITCH, PLASTIC, LQFP-52
文件頁數(shù): 7/59頁
文件大?。?/td> 528K
代理商: R5F21257SDFP
R8C/24 Group, R8C/25 Group
2. Central Processing Unit (CPU)
Rev.3.00
Feb 29, 2008
Page 15 of 51
REJ03B0117-0300
2.8.7
Interrupt Enable Flag (I)
The I flag enables maskable interrupts.
Interrupt are disabled when the I flag is set to 0, and are enabled when the I flag is set to 1. The I flag is set to 0
when an interrupt request is acknowledged.
2.8.8
Stack Pointer Select Flag (U)
ISP is selected when the U flag is set to 0; USP is selected when the U flag is set to 1.
The U flag is set to 0 when a hardware interrupt request is acknowledged or the INT instruction of software
interrupt numbers 0 to 31 is executed.
2.8.9
Processor Interrupt Priority Level (IPL)
IPL is 3 bits wide and assigns processor interrupt priority levels from level 0 to level 7.
If a requested interrupt has higher priority than IPL, the interrupt is enabled.
2.8.10
Reserved Bit
If necessary, set to 0. When read, the content is undefined.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
R5F21257SDFP#V0 功能描述:IC R8C/25 MCU FLASH 52LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器, 系列:R8C/2x/25 標(biāo)準(zhǔn)包裝:250 系列:80C 核心處理器:8051 芯體尺寸:8-位 速度:16MHz 連通性:EBI/EMI,I²C,UART/USART 外圍設(shè)備:POR,PWM,WDT 輸入/輸出數(shù):40 程序存儲(chǔ)器容量:- 程序存儲(chǔ)器類型:ROMless EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4.5 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:68-LCC(J 形引線) 包裝:帶卷 (TR)
R5F21257SDFP#V2 制造商:Renesas Electronics Corporation 功能描述:R8C/2A 96+0/7 64LQFP 10X10 -40 TO +85 - Trays 制造商:Renesas Electronics Corporation 功能描述:IC MCU 16BIT 48KB FLASH 52LQFP
R5F21257SDXXXFP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:RENESAS 16-BIT SINGLE-CHIP MCU R8C FAMILY / R8C/2x SERIES
R5F21257SNFP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:RENESAS 16-BIT SINGLE-CHIP MCU R8C FAMILY / R8C/2x SERIES
R5F21257SNFP#U0 制造商:Renesas Electronics Corporation 功能描述:MCU 16-bit R8C CISC 48KB Flash 3.3V/5V 52-Pin LQFP Tray 制造商:Renesas Electronics Corporation 功能描述:IC MCU 16BIT 48KB FLASH 52LQFP