參數(shù)資料
型號(hào)： DS87C530-ENL
英文描述： EPROM MICRO WITH REAL TIME CLOCK
中文描述： 微型存儲(chǔ)器與實(shí)時(shí)時(shí)鐘
文件頁(yè)數(shù)： 20/40頁(yè)
文件大小： 435K
代理商： DS87C530-ENL
DS87C530
022197 20/40
RING OSCILLATOR EXIT FROM STOP MODE
Figure 4
CRYSTAL
POWER
CRYSTAL
RING
POWER
4–10 ms
uC ENTERS
CINTERRUPT;
CLOCK
uC ENTERS
uC ENTERS
INTERRUPT;
uC ENTERS
POWER SAVED
STOP MODE WITH RING STARTUP
uC OPERATING
STOP MODE WITHOUT RING STARTUP
Note: Diagram assumes that the operation following Stop requires less than 18 ms to complete.
EMI REDUCTION
The DS87C530 allows software to reduce EMI. One of
the major contributors to radiated noise in an 8051
based system is the toggling of ALE. The DS87C530
allows software to disable ALE when not used by setting
the ALEOFF (PMR.2) bit to a 1. When ALEOFF = 1,
ALE will still toggle during an off–chip MOVX. However,
ALE will remain in a static when performing on–chip
memory access. The default state of ALEOFF = 0 so
ALE toggles with every instruction cycle.
PERIPHERAL OVERVIEW
The DS87C530 provides several of the most commonly
needed peripheral functions in microcomputer–based
systems. These new functions include a second serial
port, Power–fail Reset, Power–fail Interrupt, and a pro-
grammable Watchdog Timer. These are described
below, and more details are available in the High–
Speed Microcontroller User’s Guide.
SERIAL PORTS
The DS87C530 provides a serial port (UART) that is
identical to the 80C52. In addition it includes a second
hardware serial port that is a full duplicate of the stan-
dard one. This port optionally uses pins P1.2 (RXD1)
and P1.3 (TXD1). It has duplicate control functions
included in new SFR locations.
Both ports can operate simultaneously but can be at dif-
ferent baud rates or even in different modes. The second
serial port has similar control registers (SCON1; C0h,
SBUF1; C1h) to the original. The new serial port can only
use Timer 1 for timer generated baud rates.
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DS87C530-KCL EPROM MICRO WITH REAL TIME CLOCK
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)格:SMD/SMT
DS87C530-QCL 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)格:SMD/SMT
DS87C530-QCL+ 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)格:SMD/SMT
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