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| 型號(hào)： | AT90USB647-AU |
| 廠商： | Atmel |
| 文件頁(yè)數(shù)： | 38/106頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC AVR MCU 64K 64TQFP |
| 產(chǎn)品培訓(xùn)模塊： | megaAVR Introduction |
| 標(biāo)準(zhǔn)包裝： | 450 |
| 系列： | AVR® |
| 應(yīng)用： | USB 微控制器 |
| 核心處理器： | AVR |
| 程序存儲(chǔ)器類型： | 閃存（64 kB） |
| 控制器系列： | AT90 USB |
| RAM 容量： | 4K 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-TQFP，64-VQFP |
| 包裝： | 托盤 |
| 供應(yīng)商設(shè)備封裝： | 64-TQFP |
| 配用： | ATSTK600-RC17-ND - STK600 ROUTING CARD AVR ATSTK525-ND - KIT STARTER FOR AT90USB AT90USBKEY2-ND - KIT DEMO FOR AT90USB |
| 其它名稱： | AT90USB647-16AU AT90USB647-16AU-ND |
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37
7593L–AVR–09/12
AT90USB64/128
stated the lines. Writing XMBK to zero disables the bus keeper. XMBK is not qualified with SRE,
so even if the XMEM interface is disabled, the bus keepers are still activated as long as XMBK is
one.
Bit 6..3 – Res: Reserved Bits
These bits are reserved and will always read as zero. When writing to this address location,
write these bits to zero for compatibility with future devices.
Bit 2..0 – XMM2, XMM1, XMM0: External Memory High Mask
When the External Memory is enabled, all Port C pins are default used for the high address byte.
If the full 60KB address space is not required to access the External Memory, some, or all, Port
C pins can be released for normal Port Pin function as described in Table 6-6. As described in
“Using all 64KB locations of external memory” on page 38, it is possible to use the XMMn bits to
access all 64KB locations of the External Memory.
6.5.8
Using all locations of external memory smaller than 64KB
Since the external memory is mapped after the internal memory as shown in Figure 6-4 on page
31, the external memory is not addressed when addressing the first 8,448/4,352 bytes
(128/64Kbytes version) of data space. It may appear that the first 8,448/4,352 bytes of the exter-
nal memory are inaccessible (external memory addresses 0x0000 to 0x10FF or 0x0000 to
0x20FF). However, when connecting an external memory smaller than 64KB, for example 32KB,
these locations are easily accessed simply by addressing from address 0x8000 to 0xA1FF.
Since the External Memory Address bit A15 is not connected to the external memory, addresses
0x8000 to 0xA1FF will appear as addresses 0x0000 to 0x21FF for the external memory.
Addressing above address 0xA1FF is not recommended, since this will address an external
memory location that is already accessed by another (lower) address. To the Application soft-
ware, the external 32KB memory will appear as one linear 32KB address space from 0x2200 to
0xA1FF. This is illustrated in Figure 6-10 on page 38.
Table 6-6.
Port C pins released as normal port pins when the external memory is enabled.
XMM2
XMM1
XMM0
# bits for external memory address
Released port pins
0
8 (full 56KB space)
None
001
7
PC7
010
6
PC7 - PC6
011
5
PC7 - PC5
100
4
PC7 - PC4
101
3
PC7 - PC3
110
2
PC7 - PC2
1
No address high bits
Full Port C
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
| AT90USB647-AUR | 功能描述:8位微控制器 -MCU 64K Flash; 2K EEPROM 4K SRAM; 48 IO 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)格:SMD/SMT |
| AT90USB647-MU | 功能描述:8位微控制器 -MCU AVR USB 64K FLSH-OTG 16MHz Ind Temp 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)格:SMD/SMT |
| AT90USB647-MUR | 功能描述:8位微控制器 -MCU USB 64K FLASH 16 MHz 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)格:SMD/SMT |
| AT90USB64X | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:USB DFU Bootloader |
| AT90USB82 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:8-bit Microcontroller with 8/16K Bytes of ISP Flash and USB Controller |
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