参数资料
型号: MT80C51C-16D
厂商: ATMEL CORP
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP44
封装: 1 MM HEIGHT, QFP-44
文件页数: 9/170页
文件大小: 4133K
代理商: MT80C51C-16D
106
ATtiny4/5/9/10 [DATASHEET]
8127F–AVR–02/2013
15. Memory Programming
15.1
Features
Two Embedded Non-Volatile Memories:
– Non-Volatile Memory Lock bits (NVM Lock bits)
– Flash Memory
Four Separate Sections Inside Flash Memory:
– Code Section (Program Memory)
– Signature Section
– Configuration Section
– Calibration Section
Read Access to All Non-Volatile Memories from Application Software
Read and Write Access to Non-Volatile Memories from External programmer:
– Read Access to All Non-Volatile Memories
– Write Access to NVM Lock Bits, Flash Code Section and Flash Configuration Section
External Programming:
– Support for In-System and Mass Production Programming
– Programming Through the Tiny Programming Interface (TPI)
High Security with NVM Lock Bits
15.2
Overview
The Non-Volatile Memory (NVM) Controller manages all access to the Non-Volatile Memories. The NVM Controller
controls all NVM timing and access privileges, and holds the status of the NVM.
During normal execution the CPU will execute code from the code section of the Flash memory (program memory).
When entering sleep and no programming operations are active, the Flash memory is disabled to minimize power
consumption.
All NVM are mapped to the data memory. Application software can read the NVM from the mapped locations of
data memory using load instruction with indirect addressing.
The NVM has only one read port and, therefore, the next instruction and the data can not be read simultaneously.
When the application reads data from NVM locations mapped to the data space, the data is read first before the
next instruction is fetched. The CPU execution is here delayed by one system clock cycle.
Internal programming operations to NVM have been disabled and the NVM therefore appears to the application
software as read-only. Internal write or erase operations of the NVM will not be successful.
The method used by the external programmer for writing the Non-Volatile Memories is referred to as external pro-
gramming. External programming can be done both in-system or in mass production. See Figure 14-2 on page 96.
The external programmer can read and program the NVM via the Tiny Programming Interface (TPI).
In the external programming mode all NVM can be read and programmed, except the signature and the calibration
sections which are read-only.
NVM can be programmed at 5V, only.
15.3
Non-Volatile Memories
The ATtiny4/5/9/10 have the following, embedded NVM:
Non-Volatile Memory Lock Bits
Flash memory with four separate sections
相关PDF资料
PDF描述
MT80C51T-16D 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP44
MF280C51T-36R 8-BIT, MROM, 36 MHz, MICROCONTROLLER, PQFP44
MF280C51-36D 8-BIT, MROM, 36 MHz, MICROCONTROLLER, PQFP44
MF180C51T-12D 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP44
MV80C51C-20R 8-BIT, MROM, 20 MHz, MICROCONTROLLER, PQFP44
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