- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄367742 > P89LPC938 (NXP Semiconductors N.V.) 8-bit microcontroller with accelerated two-clock 80C51 core 8 kB 3 V byte-erasable Flash with 10-bit A/D converter PDF資料下載
參數(shù)資料
| 型號： | P89LPC938 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 8-bit microcontroller with accelerated two-clock 80C51 core 8 kB 3 V byte-erasable Flash with 10-bit A/D converter |
| 中文描述： | 8位加速兩個小時微控制器的80C51內(nèi)核8 KB的3伏字節(jié)可擦除閃存的10位A / D轉(zhuǎn)換器 |
| 文件頁數(shù)： | 45/68頁 |
| 文件大?。?/td> | 318K |
| 代理商： | P89LPC938 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁當(dāng)前第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁
9397 750 14051
Koninklijke Philips Electronics N.V. 2005. All rights reserved.
Product data sheet
Rev. 01 — 25 February 2005
45 of 68
Philips Semiconductors
P89LPC938
8-bit microcontroller with 10-bit A/D converter
In addition, IAP operations can be accomplished through the use of four SFRs consisting
of a control/status register, a data register, and two address registers. Additional details
may be found in the P89LPC938 User’s Manual
7.28.8
ISP
In-System Programming is performed without removing the microcontroller from the
system. The In-System Programming facility consists of a series of internal hardware
resources coupled with internal firmware to facilitate remote programming of the
P89LPC938 through the serial port. This firmware is provided by Philips and embedded
within each P89LPC938 device. The Philips In-System Programming facility has made
in-system programming in an embedded application possible with a minimum of additional
expense in components and circuit board area. The ISP function uses five pins (V
DD
, V
SS
,
TXD, RXD, and RST). Only a small connector needs to be available to interface your
application to an external circuit in order to use this feature.
7.28.9
Power-on reset code execution
The P89LPC938 contains two special Flash elements: the Boot Vector and the Boot
Status Bit. Following reset, the P89LPC938 examines the contents of the Boot Status Bit.
If the Boot Status Bit is set to zero, power-up execution starts at location 0000H, which is
the normal start address of the user’s application code. When the Boot Status Bit is set to
a value other than zero, the contents of the Boot Vector is used as the high byte of the
execution address and the low byte is set to 00H.
Table 8
shows the factory default Boot Vector setting for this device. A factory-provided
boot loader is pre-programmed into the address space indicated and uses the indicated
boot loader entry point to perform ISP functions. This code can be erased by the user.
Users who wish to use this loader should take precautions to avoid erasing the
1 kB sector that contains this boot loader. Instead, the page erase function can be
used to erase the first eight 64-byte pages located in this sector.
A custom boot
loader can be written with the Boot Vector set to the custom boot loader, if desired.
7.28.10
Hardware activation of the boot loader
The boot loader can also be executed by forcing the device into ISP mode during a
power-on sequence (see the P89LPC938 User’s Manualfor specific information). This
has the same effect as having a non-zero status byte. This allows an application to be built
that will normally execute user code but can be manually forced into ISP operation. If the
factory default setting for the Boot Vector (1FH) is changed, it will no longer point to the
factory pre-programmed ISP boot loader code. After programming the Flash, the status
byte should be programmed to zero in order to allow execution of the user’s application
code beginning at address 0000H.
Table 8:
Device
Default Boot Vector values and ISP entry points
Default
Boot Vector
Default
boot loader
entry point
1F00H
Defaultboot loader
code range
1 kB sector
range
P89LPC938
1FH
1E00H to 1FFFH
1C00H to 1FFFH
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| P89LPC938FA | 8-bit microcontroller with accelerated two-clock 80C51 core 8 kB 3 V byte-erasable Flash with 10-bit A/D converter |
| P89LV51RB2BBC | 8-bit 80C51 3 V low power 16/32/64 kB Flash microcontroller with 1 kB RAM |
| P89LV51RB2 | 8-bit 80C51 3 V low power 16/32/64 kB Flash microcontroller with 1 kB RAM |
| P89LV51RB2BA | 8-bit 80C51 3 V low power 16/32/64 kB Flash microcontroller with 1 kB RAM |
| P89LV51RD2BN | 8-bit 80C51 3 V low power 16/32/64 kB Flash microcontroller with 1 kB RAM |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| P89LPC9381 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit microcontroller with accelerated two-clock 80C51 core 4 kB 3 V byte-erasable flash with 10-bit ADC |
| P89LPC9381FA | 功能描述:8位微控制器 -MCU 4K FL/256B RAM/ I2C/10B ADC 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(fēng)格:SMD/SMT |
| P89LPC9381FA,112 | 功能描述:8位微控制器 -MCU 4K FL/256B 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(fēng)格:SMD/SMT |
| P89LPC9381FDH | 功能描述:8位微控制器 -MCU 4K FL/256B RAM/ I2C/10B ADC 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(fēng)格:SMD/SMT |
| P89LPC9381FDH,512 | 功能描述:8位微控制器 -MCU 4K FL/256B 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(fēng)格:SMD/SMT |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。