參數(shù)資料
型號(hào)： 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(chǔ)器高速微與A / D及PWM（帶A / D轉(zhuǎn)換和脈寬調(diào)制的存儲(chǔ)器/ ROM的高速微控制器）
文件頁(yè)數(shù)： 23/27頁(yè)
文件大?。?/td> 119K
代理商： DS87C550
APPLICATION NOTE 78
030998 23/27
MOV A,#0h ; Reset data pointer. Use A for faster fill.
NEXT_LOC: MOVX @DPTR, A ;Fill location & increment to next one.
INC DPTR
MOV R0, DPH ;If DPH is not 04, then do next location.
CJNE R0, #04h, NEXT_LOC
MOV DPTR, #DATA_TABLE ;On–chip SRAM has been cleared. Reset
RETI ; pointer to beginning of table and return.
DNLOAD: MOV A, STATUS ;Wait until crystal has stabilized.
JNB ACC.4, DNLOAD
ORL EXIF, #08h ;Switch to the crystal.
MOV A,#’!’ ;Transmit starting character. Remaining
MOV SBUF0, A ; data will be sent by serial port
JNB F0, $ ;Loop here until entire table is transmitted.
CLR F0 ;Transmit complete. Clear completion flag.
MOV DPS, #01h ;Switch to DPTR1 and reset transmit pointer.
MOV DPTR, #DATA_TABLE
MOV DPS, #0h ;Switch back to DPTR0 to log data.
ANL EXIF, #0F7h ;Switch back to ring oscillator and return
INVALID: RETI ; to Stop mode.
;***************************************************************************
;RTC_INT – This ISR is used to read a value from port 1. It is called every
; 30 minutes, and logs data to the data buffer. When done, it will
; return to the main loop where it will enter Stop mode again.
; This simple example assumes that the device will be read before
; the data overflows the on–chip SRAM, so no error checking is
; included.
;***************************************************************************
RTC_INT: ANL RTCC, #0FDh ;Clear RTC Interrupt flag.
PUSH ACC ;Save accumulator.
PUSH DPS ;Save data pointer, in case we are interrupting
MOV DPS,#0h ; data download, and switch to data pointer 0.
MOV A, P1 ;Read data from port 1, store it in data table.
MOVX @DPTR, A
INC DPTR ;Point to next location.
XRL RTAM,#1Eh ;Toggles RTC alarm minute register between 0 &
; 30 to interrupt on hour and half hour.
POP DPS ;Restore data pointer selector and accumulator.
POP ACC
RETI
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS87C550-FCL 制造商:DALLAS 制造商全稱(chēng):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(chēng):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(chēng):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(chēng):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(lèi)別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:87C 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標(biāo)準(zhǔn)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(shè)備:LED，POR，WDT 輸入/輸出數(shù):9 程序存儲(chǔ)器容量:64KB（64K x 8） 程序存儲(chǔ)器類(lèi)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(zhuǎn)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(pán) 包裝:管件
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