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56F8014_07 参数 Datasheet PDF下载

56F8014_07图片预览
型号: 56F8014_07
PDF下载: 下载PDF文件 查看货源
内容描述: 16位数字信号控制器 [16-bit Digital Signal Controllers]
分类和应用: 控制器
文件页数/大小: 125 页 / 2055 K
品牌: FREESCALE [ Freescale ]
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Introduction  
7.2.3  
Flash Lockout Recovery using CodeWarrior  
CodeWarrior can unlock a device using the command sequence described in Section 7.2.2 by selecting the  
Debug menu, then selecting DSP56800E, followed by Unlock Flash.  
Another mechanism is also built into CodeWarrior using the device’s memory configuration file. The  
command “Unlock_Flash_on_Connect1” in the .cfg file accomplishes the same task as using the Debug  
menu.  
7.2.4  
Product Analysis  
The recommended method of unsecuring a programmed 56F8014 for product analysis of field failures is  
via the backdoor key access. The customer would need to supply Technical Support with the backdoor key  
and the protocol to access the backdoor routine in the Flash. Additionally, the KEYEN bit that allows  
backdoor key access must be set.  
An alternative method for performing analysis on a secured microcontroller would be to mass-erase and  
reprogram the Flash with the original code, but modify the security bytes.  
To insure that a customer does not inadvertently lock himself out of the 56F8014 during programming, it  
is recommended that the user program the backdoor access key first, the application code second and the  
security bytes within the FM configuration field last.  
Part 8 General Purpose Input/Output (GPIO)  
8.1 Introduction  
This section is intended to supplement the GPIO information found in the 56F801X Peripheral Reference  
Manual and contains only chip-specific information. This information supercedes the generic information  
in the 56F801X Peripheral Reference Manual.  
8.2 Configuration  
There are four GPIO ports defined on the 56F8014. The width of each port, the associated peripheral and  
reset functions are shown in Table 8-1. The specific mapping of GPIO port pins is shown in Table 8-2.  
Table 8-1 GPIO Ports Configuration  
Available  
GPIO Port  
Pins in  
Peripheral Function  
Reset Function  
56F8014  
PWM, Reset  
GPIO, except GPIOA7  
A
B
C
D
6
8
8
4
SPI, SCI, Timer  
ADC  
GPIO  
Analog  
JTAG  
JTAG  
56F8014 Technical Data, Rev. 9  
Freescale Semiconductor  
Preliminary  
83  
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