參數(shù)資料
型號： DS87C530-ECL
廠商： Maxim Integrated Products
文件頁數(shù)： 21/45頁
文件大?。?/td> 0K
描述： IC MCU EPR/ROM W/RTC 33MZ 52TQFP
標準包裝： 96
系列： 87C
核心處理器： 8051
芯體尺寸： 8-位
速度： 33MHz
連通性： EBI/EMI，SIO，UART/USART
外圍設(shè)備： 電源故障復位，WDT
輸入/輸出數(shù)： 32
程序存儲器容量： 16KB（16K x 8）
程序存儲器類型： OTP
RAM 容量： 1K x 8
電壓 - 電源 (Vcc/Vdd)： 4.5 V ~ 5.5 V
振蕩器型： 外部
工作溫度： 0°C ~ 70°C
封裝/外殼： 52-TQFP
包裝： 托盤
DS87C530/DS83C530 EPROM/ROM Microcontrollers with Real-Time Clock
28 of 45
TIMED-ACCESS PROTECTION
It is useful to protect certain SFR bits from an accidental write operation. The Timed-Access procedure
stops an errant CPU from accidentally changing these bits. It requires that the following instructions
precede a write of a protected bit.
MOV
0C7h, #0AAh
MOV
0C7h, #55h
Writing an AAh and then a 55h to the Timed-Access register (location C7h) opens a three-cycle window
for write access. The window allows software to modify a protected bit(s). If these instructions do not
immediately precede the write operation, then the write will not take effect. The protected bits are:
EXIF.0
BGS
Bandgap Select
WDCON.6
POR
Power-On Reset flag
WDCON.1
EWT
Enable Watchdog Reset
WDCON.0
RWT
Restart Watchdog
WDCON.3
WDIF
Watchdog Interrupt Flag
ROMSIZE.2
RMS2
ROM Size Select 2
ROMSIZE.1
RMS1
ROM Size Select 1
ROMSIZE.0
RMS0
ROM Size Select 0
TRIM.7–0
—
All RTC Trim Functions
RTCC.2
RTCWE
RTC Write Enable
RTCC.0
RTCE
RTC Oscillator Enable
EPROM PROGRAMMING
The DS87C530 follows standards for a 16kB EPROM version in the 8051 family. It is available in a UV
erasable, ceramic windowed package and in plastic packages for one-time user-programmable versions.
The part has unique signature information so programmers can support its specific EPROM options.
PROGRAMMING PROCEDURE
The DS87C530 should run from a clock speed between 4MHz and 6MHz when programmed. The
programming fixture should apply address information for each byte to the address lines and the data
value to the data lines. The control signals must be manipulated as shown in Table 9. The diagram in
Figure 5 shows the expected electrical connection for programming. Note that the programmer must
apply addresses in demultiplexed fashion to Ports 1 and 2 with data on Port 0. Waveforms and timing are
provided in the Electrical Specifications section. Program the DS87C530 as follows:
1)
Apply the address value,
2)
Apply the data value,
3)
Select the programming option from Table 9 using the control signals,
4)
Increase the voltage on VPP from 5V to 12.75V if writing to the EPROM,
5)
Pulse the
PROG signal five times for EPROM array and 25 times for encryption table, lock bits, and other
EPROM bits,
6)
Repeat as many times as necessary.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
DS87C530-ECL+ 功能描述:8位微控制器 -MCU EPROM MCU w/RTC RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
DS87C530-ENL 功能描述:8位微控制器 -MCU EPROM MCU w/RTC RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
DS87C530-ENL+ 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:EPROM/ROM Microcontrollers with Real-Time Clock
DS87C530-KCL 功能描述:8位微控制器 -MCU EPROM MCU w/RTC RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
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