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參數資料
| 型號： | P89V51RB2 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 8-bit 80C51 5 V low power 16/32/64 kB Flash microcontroller with 1 kB RAM |
| 中文描述： | 8位80C51的5 V低功耗16/32/64 kB閃存1 KB RAM內存控制器 |
| 文件頁數： | 21/77頁 |
| 文件大小： | 350K |
| 代理商： | P89V51RB2 |
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Philips Semiconductors
P89V51RB2/RC2/RD2
8-bit microcontrollers with 80C51 core
Product data
Rev. 03 — 02 December 2004
21 of 77
9397 750 14341
Koninklijke Philips Electronics N.V. 2004. All rights reserved.
P89V51RB2/RC2/RD2 through the serial port. This firmware is provided by Philips
and embedded within each P89V51RB2/RC2/RD2 device. The Philips In-System
Programming facility has made in-circuit 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.
7.2.4
Using the In-System Programming
The ISP feature allows for a wide range of baud rates to be used in your application,
independent of the oscillator frequency. It is also adaptable to a wide range of
oscillator frequencies. This is accomplished by measuring the bit-time of a single bit
in a received character. This information is then used to program the baud rate in
terms of timer counts based on the oscillator frequency. The ISP feature requires that
an initial character (an uppercase U) be sent to the P89V51RB2/RC2/RD2 to
establish the baud rate. The ISP firmware provides auto-echo of received characters.
Once baud rate initialization has been performed, the ISP firmware will only accept
Intel Hex-type records. Intel Hex records consist of ASCII characters used to
represent hexadecimal values and are summarized below:
:NNAAAARRDD..DDCC<crlf>
In the Intel Hex record, the ‘NN’ represents the number of data bytes in the record.
The P89V51RB2/RC2/RD2 will accept up to 32 data bytes. The ‘AAAA’ string
represents the address of the first byte in the record. If there are zero bytes in the
record, this field is often set to 0000. The ‘RR’ string indicates the record type. A
record type of ‘00’ is a data record. A record type of ‘01’ indicates the end-of-file
mark. In this application, additional record types will be added to indicate either
commands or data for the ISP facility.
The maximum number of data bytes in a record is limited to 32 (decimal). ISP
commands are summarized in
Table 12
. As a record is received by the
P89V51RB2/RC2/RD2, the information in the record is stored internally and a
checksum calculation is performed. The operation indicated by the record type is not
performed until the entire record has been received. Should an error occur in the
checksum, the P89V51RB2/RC2/RD2 will send an ‘X’ out the serial port indicating a
checksum error. If the checksum calculation is found to match the checksum in the
record, then the command will be executed. In most cases, successful reception of
the record will be indicated by transmitting a ‘.’ character out the serial port.
相關PDF資料 |
PDF描述 |
|---|---|
| P89V51RB2BA | 8-bit 80C51 5 V low power 16/32/64 kB Flash microcontroller with 1 kB RAM |
| P89V51RB2BBC | 8-bit 80C51 5 V low power 16/32/64 kB Flash microcontroller with 1 kB RAM |
| P89V51RC2 | 8-bit 80C51 5 V low power 16/32/64 kB Flash microcontroller with 1 kB RAM |
| P89V51RC2BN | 8-bit 80C51 5 V low power 16/32/64 kB Flash microcontroller with 1 kB RAM |
| P89V51RD2 | 8-bit 80C51 5 V low power 64 kB Flash microcontroller with 1 kB RAM |
相關代理商/技術參數 |
參數描述 |
|---|---|
| P89V51RB2_09 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit 80C51 5 V low power 16/32/64 kB flash microcontroller with 1 kB RAM |
| P89V51RB2BA | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:8-bit 80C51 5 V low power 16/32/64 kB Flash microcontroller with 1 kB RAM |
| P89V51RB2BBC | 功能描述:8位微控制器 -MCU 16K/512 FL 12 CLK ISP/IAP COMM RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 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 |
| P89V51RB2BBC,557 | 功能描述:8位微控制器 -MCU 16K/512 FL 12 CLK RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數據總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數據 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 |
| P89V51RB2FA | 制造商:NXP Semiconductors 功能描述:MCU 8BIT 80C51 16K FLASH PLCC44 |
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