參數(shù)資料
型號(hào)： P89LPC902
廠商： NXP Semiconductors N.V.
英文描述： 8-bit microcontrollers with two-clock 80C51 core 1 kB 3 V Flash with 128-byte RAM
中文描述： 8位微控制器兩個(gè)小時(shí)80C51的核心具有1KB 3伏閃光的128字節(jié)RAM
文件頁數(shù)： 40/55頁
文件大?。?/td> 1236K
代理商： P89LPC902
Philips Semiconductors
P89LPC901/902/903
8-bit microcontrollers with two-clock 80C51 core
Product data
Rev. 04 — 21 November 2003
40 of 55
9397 750 12293
Koninklijke Philips Electronics N.V. 2003. All rights reserved.
8.25 Additional features
8.25.1
Software reset
The SRST bit in AUXR1 gives software the opportunity to reset the processor
completely, as if an external reset or Watchdog reset had occurred. Care should be
taken when writing to AUXR1 to avoid accidental software resets.
8.25.2
Dual data pointers
The dual Data Pointers (DPTR) provides two different Data Pointers to specify the
address used with certain instructions. The DPS bit in the AUXR1 register selects
one of the two Data Pointers. Bit 2 of AUXR1 is permanently wired as a logic ‘0’ so
that the DPS bit may be toggled (thereby switching Data Pointers) simply by
incrementing the AUXR1 register, without the possibility of inadvertently altering other
bits in the register.
8.26 Flash program memory
8.26.1
General description
The P89LPC901/902/903 Flash memory provides in-circuit electrical erasure and
programming. The Flash can be erased, read, and written as bytes. The Sector and
Page Erase functions can erase any Flash sector (256 bytes) or page (16 bytes). The
Chip Erase operation will erase the entire program memory. In-Circuit Programming
using standard commercial programmers is available. In addition, In-Application
Programming (IAP) and byte erase allows code memory to be used for non-volatile
data storage. On-chip erase and write timing generation contribute to a user-friendly
programming interface. The P89LPC901/902/903 Flash reliably stores memory
contents even after more than 100,000 erase and program cycles. The cell is
(1) Watchdog reset can also be caused by an invalid feed sequence, or by writing to WDCON not immediately followed by a
feed sequence.
Fig 20. Watchdog timer in Watchdog mode (WDTE = ‘1’).
PRE2
PRE1
PRE0
–
–
WDRUN
WDTOF
WDCLK
WDCON (A7H)
CONTROL REGISTER
PRESCALER
002aaa423
SHADOW
REGISTER
FOR WDCON
8-BIT DOWN
COUNTER
WDL (C1H)
Watchdog
oscillator
PCLK
÷
32
MOV WFEED1, #0A5H
MOV WFEED2, #05AH
RESET
see note (1)
相關(guān)PDF資料
PDF描述
P89LPC902FD 8-bit microcontrollers with two-clock 80C51 core 1 kB 3 V Flash with 128-byte RAM
P89LPC902FN 8-bit microcontrollers with two-clock 80C51 core 1 kB 3 V Flash with 128-byte RAM
P89LPC903 8-bit microcontrollers with two-clock 80C51 core 1 kB 3 V Flash with 128-byte RAM
P89LPC903FD 8-bit microcontrollers with two-clock 80C51 core 1 kB 3 V Flash with 128-byte RAM
P89LPC907FD 71-331814-05S
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
P89LPC902FD 功能描述:8位微控制器 -MCU 80C51 1K FL 128B RAM 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
P89LPC902FD,112 功能描述:8位微控制器 -MCU 80C51 1K FL 128B RAM 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
P89LPC902FD.512 制造商:NXP Semiconductors 功能描述:8BIT MCU 1K FLASH 89LC902 SOIC8
P89LPC902FD112 制造商:NXP Semiconductors 功能描述:IC 8BIT MCU 80C51 12MHZ SOIC-8
P89LPC902FN 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit microcontrollers with two-clock 80C51 core 1 kB 3 V Flash with 128-byte RAM
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