參數(shù)資料
型號: AT90USB1286-MU
廠商: Atmel
文件頁數(shù): 37/106頁
文件大?。?/td> 0K
描述: IC AVR MCU 128K 64QFN
產(chǎn)品培訓模塊: megaAVR Introduction
標準包裝: 1,300
系列: AVR®
應用: USB 微控制器
核心處理器: AVR
程序存儲器類型: 閃存(128 kB)
控制器系列: AT90 USB
RAM 容量: 8K x 8
接口: 2 線串行,SPI 串行,USART,USB
輸入/輸出數(shù): 48
電源電壓: 2.7 V ~ 5.5 V
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 64-VFQFN 裸露焊盤
包裝: 托盤
供應商設備封裝: 64-QFN(8x8)
配用: ATSTK600-TQFP64-ND - STK600 SOCKET/ADAPTER 64-TQFP
ATSTK525-ND - KIT STARTER FOR AT90USB
AT90USBKEY2-ND - KIT DEMO FOR AT90USB
其它名稱: AT90USB1286-16MU
AT90USB1286-16MU-ND
36
7593L–AVR–09/12
AT90USB64/128
Bit 3..2 – SRW11, SRW10: Wait-state Select bits for upper sector
The SRW11 and SRW10 bits control the number of wait-states for the upper sector of the exter-
nal memory address space, see Table 6-5.
Bit 1..0 – SRW01, SRW00: Wait-state Select bits for lower sector
The SRW01 and SRW00 bits control the number of wait-states for the lower sector of the exter-
nal memory address space, see Table 6-5.
Note:
1. n = 0 or 1 (lower/upper sector).
For further details of the timing and wait-states of the External Memory Interface, see Figures
6-6 through Figures 6-9 on page 33 to page 35 for how the setting of the SRW bits affects the
timing.
6.5.7
XMCRB – External Memory Control Register B
Bit 7– XMBK: External Memory Bus-keeper Enable
Writing XMBK to one enables the bus keeper on the AD7:0 lines. When the bus keeper is
enabled, AD7:0 will keep the last driven value on the lines even if the XMEM interface has tri-
Table 6-4.
Sector limits with different settings of SRL2..0.
SRL2
SRL1
SRL0
Sector limits
00
x
Lower sector = N/A
Upper sector = 0x2100 - 0xFFFF
01
0
Lower sector = 0x2100 - 0x3FFF
Upper sector = 0x4000 - 0xFFFF
01
1
Lower sector = 0x2100 - 0x5FFF
Upper sector = 0x6000 - 0xFFFF
10
0
Lower sector = 0x2100 - 0x7FFF
Upper sector = 0x8000 - 0xFFFF
10
1
Lower sector = 0x2100 - 0x9FFF
Upper sector = 0xA000 - 0xFFFF
11
0
Lower sector = 0x2100 - 0xBFFF
Upper sector = 0xC000 - 0xFFFF
11
1
Lower sector = 0x2100 - 0xDFFF
Upper sector = 0xE000 - 0xFFFF
Table 6-5.
Wait states
SRWn1
SRWn0
Wait states
00
No wait-states
0
1
Wait one cycle during read/write strobe
10
Wait two cycles during read/write strobe
11
Wait two cycles during read/write and wait one cycle before driving out
new address
Bit
7654
3
210
XMBK
XMM2
XMM1
XMM0
XMCRB
Read/write
R/W
R
R/W
Initial value
0000
0
000
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AT90USB1287 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Microcontroller with 64/128K Bytes of ISP Flash and USB Controller
AT90USB1287-16AU 功能描述:8位微控制器 -MCU 128kB Flash 4kB EEPROM 48 I/O Pins RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
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AT90USB1287-16ME 制造商:Atmel Corporation 功能描述: