EM250-BBRD-R Ember, EM250-BBRD-R Datasheet - Page 21

• Manufacturer Part Number: EM250-BBRD-R
• Description: EM250 BREAKOUT BOARD
• Manufacturer: Ember
• Type: Transceiver, 802.15.4r

Specifications of EM250-BBRD-R

• Frequency: 2.4GHz
• For Use With/related Products: EM250
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 636-1024

0x1FFFF
0x1BFFF
0x0BFFF
0x1C000
0x17FFF
0x13FFF
0x0C000
0x07FFF
0x03FFF
0x18000
0x14000
0x08000
0x04000
0x00000
Physical Flash
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.
4.6.1
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 stack and HAL.
Divided in 16 kB
128 kB Flash
Windows
Flash Memory
Window 0
7
6
5
4
3
2
1
Figure 4. Data Address Space
(Note: Addresses are in Bytes)
Data Address Space
0x7FFF
0x6C00
0x6BFF
0x4FFF
0x3FFF
0x5400
0x53FF
0x5000
0x4000
0x0000
(word access only)
Page 21
Unimplemented
Flash Window
Configurable
Registers
RAM
Info Page
Other Physical Memories
1 kB Flash Info
Register Block
5 kB SRAM
Page
EM250
120-0082-000S