參數(shù)資料
型號： P89C660HBA
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： 80C51 8-bit Flash microcontroller family
中文描述： 8-BIT, FLASH, 33 MHz, MICROCONTROLLER, PQCC44
封裝： PLASTIC, MS-018, SOT-187-2, LCC-44
文件頁數(shù)： 64/89頁
文件大?。?/td> 491K
代理商： P89C660HBA
Philips Semiconductors
Product data
P89C660/P89C662/P89C664/
P89C668
80C51 8-bit Flash microcontroller family
16KB/32KB/64KB ISP/IAP Flash with 512B/1KB/2KB/8KB RAM
2002 Oct 28
64
FFFF
C000
8000
4000
2000
0000
BLOCK 4
16 KBYTES
BLOCK 3
16 KBYTES
BLOCK 2
16 KBYTES
BLOCK 1
8 KBYTES
BLOCK 0
8 KBYTES
PROGRAM
ADDRESS
BOOT ROM
(1 KBYTE)
FFFF
FC00
SU01264
89C664/89C668
89C662
89C660
Figure 55. Flash Memory Configurations
Power-On Reset Code Execution
The P89C660/662/664/668 contains two special Flash registers: the
BOOT VECTOR and the STATUS BYTE. At the falling edge of reset,
the P89C660/662/664/668 examines the contents of the Status
Byte. If the Status Byte 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 Status Byte 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. The factory
default setting is 0FCH, corresponds to the address 0FC00H for the
factory masked-ROM ISP boot loader. A custom boot loader can be
written with the Boot Vector set to the custom boot loader.
NOTE:
both bytes are erased at the same time. It is necessary
to reprogram the Boot Vector after erasing and
updating the Status Byte.
When erasing the Status Byte or Boot Vector,
Hardware Activation of the Boot Loader
The boot loader can also be executed by holding PSEN LOW, P2.7,
P2.6 high, EA greater than V
IH
(such as +5 V), and ALE HIGH (or
not connected) at the falling edge of RESET. This is the same effect
as having a non-zero status byte. This allows an application to be
built that will normally execute the end user’s code but can be
manually forced into ISP operation.
If the factory default setting for the Boot Vector (0FCH) is changed, it
will no longer point to the ISP masked-ROM boot loader code. If this
happens, the only possible way to change the contents of the Boot
Vector is through the parallel programming method, provided that
the end user application does not contain a customized loader that
provides for erasing and reprogramming of the Boot Vector and
Status Byte.
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.
相關PDF資料
PDF描述
P89C660HFA 80C51 8-bit Flash microcontroller family
P89C662HFA 80C51 8-bit Flash microcontroller family
P89C662HFBD 80C51 8-bit Flash microcontroller family
P89C664 80C51 8-bit Flash microcontroller family
P89C664HFA 80C51 8-bit Flash microcontroller family
相關代理商/技術參數(shù)
參數(shù)描述
P89C660HBA/00,512 功能描述:8位微控制器 -MCU 16K/512 FL 6 CLK ISP/IAP COM 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
P89C660HBBD 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:80C51 8-bit Flash microcontroller family
P89C660HBBD/00,557 功能描述:8位微控制器 -MCU 16K/512 FL 6 CLK ISP/IAP COM 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
P89C660HFA 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:80C51 8-bit Flash microcontroller family
P89C660HFA/00,512 功能描述:8位微控制器 -MCU 16K/512 FL 6 CLK ISP/IAP IND 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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