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參數(shù)資料
| 型號： | DS87C550 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | EPROM High-Speed Micro with A/D and PWM(帶 A/D 和 PWM的EPROM/ROM高速微控制器) |
| 中文描述： | 存儲器高速微與A / D及PWM（帶A / D轉換和脈寬調(diào)制的存儲器/ ROM的高速微控制器） |
| 文件頁數(shù)： | 15/27頁 |
| 文件大?。?/td> | 119K |
| 代理商： | DS87C550 |
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APPLICATION NOTE 78
030998 15/27
PROGRAM EXAMPLE: SOFTWARE RING OSCILLATOR SWITCHBACK
;Program RING_SWB
;
;This program shows how the serial ports can be operated in conjunction with
;the ring oscillator. When receiving a byte, the falling edge of the start
;bit will generate an INT1. The INT1 ISR will restart the crystal oscillator.
;When the crystal has stabilized, the system will transmit a ready character
;to the originator to indicate that the receiver is ready.
;
;The core of the program continuously scans Port 1 and records the maximum
;value. The program performs two operations: transmit the maximum
;recorded value, and reset the maximum value to 0. Receipt of an invalid
;command will cause the device to return an error code to the host and
;switch back to the ring oscillator. Invalid codes can also be used to
;intentionally return the device to the ring oscillator at the completion
;of the data transfer. Valid commands will be echoed back to the originator
;to confirm receipt.
;***************************************************************************
;Register Equates
P0 equ 80h ;Port 0
SP equ 81h ;Stack Pointer
PCON equ 87h ;Power Control Register
TMOD equ 89h ;Timer Mode Control Register
TH1 equ 8Dh ;Timer 1 MSB (used for baud rate generation)
P1 equ 90h ;Port 1
EXIF equ 91h ;External Interrupt Flag Register
SCON0 equ 98h ;Serial Port 0 Control Register
SBUF0 equ 99h ;Serial Port 0 Data Buffer
IE equ 0A8h ;Interrupt Enable Register
P3 equ 0B0h ;Port 3
PMR equ 0C4h ;Power Management Register
STATUS equ 0C5h ;Status Register
ACC equ 0E0h ;Accumulator
;R0 : Command Register.
;R1 : Maximum Value observed on Port 1.
;Bit Equates
RI_0 equ 98h ;Serial Port 0 Receiver Interrupt Flag
TI_0 equ 99h ;Serial Port 0 Transmitter Interrupt Flag
IE1 equ 8Ah ;Interrupt 1 Flag.
TR1 equ 8Eh ;Timer 1 Run control.
REN_0 equ 9Ch ;Serial Port 0 Receiver Enable
EX1 equ 0AAh ;External Interrupt 1 Enable
EA equ 0AFh ;Global Interrupt Enable
;String Equates
RDY_CHAR equ ’!’
ERR_CHAR equ ’’
;Interrupt Vector Table.
cseg at 0 ;Reset vector.
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| DS87C550-FCL | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:EPROM High-Speed Micro with A/D and PWM |
| DS87C550-FNL | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:EPROM High-Speed Micro with A/D and PWM |
| DS87C550-KCL | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:EPROM High-Speed Micro with A/D and PWM |
| DS87C550-QCL | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:EPROM High-Speed Micro with A/D and PWM |
| DS87C550-QCL+ | 功能描述:IC MCU EPROM ADC/PWM HS 68-PLCC RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:87C 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:260 系列:73S12xx 核心處理器:80515 芯體尺寸:8-位 速度:24MHz 連通性:I²C，智能卡，UART/USART，USB 外圍設備:LED，POR，WDT 輸入/輸出數(shù):9 程序存儲器容量:64KB（64K x 8） 程序存儲器類型:閃存 EEPROM 大小:- RAM 容量:2K x 8 電壓 - 電源 (Vcc/Vdd):2.7 V ~ 5.5 V 數(shù)據(jù)轉換器:- 振蕩器型:內(nèi)部 工作溫度:-40°C ~ 85°C 封裝/外殼:68-VFQFN 裸露焊盤 包裝:管件 |
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