參數(shù)資料
型號: XE8807AMI026TLF
廠商: Semtech
文件頁數(shù): 46/143頁
文件大?。?/td> 0K
描述: IC MCU LOW PWR MTP FLASH 32-TQFP
標準包裝: 1
系列: XE880x
應(yīng)用: 感測機
核心處理器: Coolrisc816?
程序存儲器類型: 閃存(11 kB)
控制器系列: XE8000
RAM 容量: 512 x 8
接口: UART,USRT
輸入/輸出數(shù): 24
電源電壓: 2.4 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 32-TQFP
包裝: 標準包裝
供應(yīng)商設(shè)備封裝: 32-TQFP(7x7)
產(chǎn)品目錄頁面: 585 (CN2011-ZH PDF)
配用: XE8000MP-ND - PROG BOARD AND PROSTART2 CARD
其它名稱: XE8807AMI026DKR
Semtech 2006
www.semtech.com
2-4
XE8806A/XE8807A
Hints for low power operation:
1.
Use the low power RAM instead of the RAM for all parameters that are accessed frequently. The average
current consumption for the low power RAM is about 40 times lower than for the RAM.
2.
Rather than using the circuit at low speed, it is better to use the circuit at higher speed and switch off the blocks
when not needed.
3.
The power consumption of the program memory is an important part of the overall power consumption. In case
you intend to use a ROM version and power consumption is too high, please ask us to provide you with a
circuit version with smaller ROM size.
2.4
Operating speed
2.4.1
Flash circuit version XE8806AM
The speed of the flash devices is not highly dependent upon the supply voltage. However, by limiting the
temperature range, the speed can be increased. The minimal guaranteed speed as a function of the supply voltage
and maximal temperature operating temperature is given in Figure 2-2.
VBAT
VREG
VSS
2.4 - 5.5 V
1uF
Figure 2-1. Supply configuration for flash circuit operation.
0
0.5
1
1.5
2
2.5
3
3.5
22.5
33.5
4
4.5
5
5.5
supply voltage VBAT (V)
speed
(MIPS)
85°C
45°C
Figure 2-2. Guaranteed speed as a function of the supply voltage and maximal temperature.
Note that the speed of the flash circuit version is limited by the flash memory. All other peripherals of the device
can run at the same speed as the ROM version (see Figure 2-6). The maximal speed of the peripherals can be
exploited by reducing the CPU frequency by a factor of 2 with respect to the clock source by executing the
instruction “FREQ div2”. Take care to execute this instruction before increasing the clock speed above the figures
given in Figure 2-2.
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