参数资料
型号: EM250-RCM-R
厂商: Silicon Laboratories Inc
文件页数: 21/124页
文件大小: 0K
描述: EM250 RCM BOARD
标准包装: 12
类型: 收发器,802.15.4/Zigbee
频率: 2.4GHz
适用于相关产品: EM250
其它名称: 636-1023
EM250
The data side of the address space contains mappings to the same Flash and RAM blocks, as well as registers
and a separate Flash information area, as shown in Figure 4.
Physical Flash
0x1FFFF
7
0x1C000
0x1BFFF
6
0x18000
0x17FFF
Data Address Space
(Note: Addresses are in Bytes)
0x7FFF
RAM
0x6C00
0x6BFF
Unimplemented
Other Physical Memories
5 kB SRAM
0x14000
5
0x5400
0x53FF
0x5000
Info Page
1 kB Flash Info
Page
0x13FFF
0x4FFF
128 kB Flash
Divided in 16 kB
Windows
4
Registers
(word access only)
0x4000
0x3FFF
Register Block
3
0x0C000
0x0BFFF
2
0x08000
0x07FFF
0x04000
0x03FFF
0x00000
1
Window 0
Configurable
Flash Window
0x0000
Figure 4. Data Address Space
4.6.1
Flash Memory
The EM250 integrates 128kB of Flash memory. The Flash cell has been qualified for a data retention time of
>100 years at room temperature. Each Flash page size is 1024 bytes and is rated to have a guaranteed 1,000
write/erase cycles.
The Flash memory has mappings to both the program and data side address spaces. On the program side, the
first 112kB of the Flash memory are mapped to the corresponding first 56k word addresses to allow for code
storage, as shown in Figure 3.
On the program side, the Flash is always read as whole words. On the data side, the Flash memory is divided
into eight 16kB sections, which can be separately mapped into a Flash window for the storage of constant data
and the Simulated EEPROM. As shown in Figure 4, the Flash window corresponds to the first 16kB of the data-
side address space. On the data side, the Flash may be read as bytes, but can only be written to one word at a
time using utility routines in the EmberZNet PRO stack and HAL.
Page 21
120-0082-000V Rev 1.1
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