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參數(shù)資料
| 型號： | AT43USB325E-AU |
| 廠商： | ATMEL CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | Multimedia USB Keyboard Controller with Embedded Hub |
| 中文描述： | 8-BIT, 12 MHz, RISC MICROCONTROLLER, PQFP64 |
| 封裝： | 1.40 MM HEIGHT, GREEN, PLASTIC, MS-026ACB, LQFP-64 |
| 文件頁數(shù)： | 11/109頁 |
| 文件大?。?/td> | 643K |
| 代理商： | AT43USB325E-AU |
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11
3355C–USB–4/05
AT43USB325
between the two versions is with respect to the serial EEPROM interface pins, GPIO PF[0:3].
The differences are:
3.4
SPI Serial EEPROM Interface (AT43USB325E Only)
The AT43USB325E is designed to interface directly with a synchronous serial peripheral inter-
face (SPI) SEEPROM such as the Atmel AT25HP256/512. All instructions, addresses and data
are transferred with the MSB first and start with a high-to-low SSN transition.
Note:
The SPI port of the AT43USB325E at PF[0:3] is dedicated for program memory downloading only.
It cannot be accessed by the firmware program.
Figure 3-1.
AT43USB325E Read Sequence
3.4.1
Read Sequence
1.
The AT43USB325E asserts its SSN output pin and outputs a 3 MHz clock at SCK. It
continues to activate SCK until the completion of the read process.
The AT43USB325E transmits the READ opcode (= 0000011) through its MOSI, fol-
lowed by the 16-bit byte address to be read, x0000. Please note that the
AT43USB325E will send a 16-byte address only. SEEPROM with SPI that requires a
24-bit address cannot be used with the AT43USB325E.
The SEEPROM then shifts out the data through its MISO pin.
The AT43USB325E de-asserts SCK and SSN after 16K bytes data read is complete.
2.
3.
4.
Figure 3-2.
READ Timing
Port F Pins
AT43USB325E
AT43USB325M
PF0
Slave Select Pin
– Its output will be asserted (low) during
downloading of firmware and will stay de-asserted (high) after
download is completed.
NC (No connect)
PF1, PF2, PF3
Functions as serial EEPROM interface signals during
downloading and as GPIO pins after download is completed.
GPIO
AT43USB325E
AT25HP256
SSN
MOSI
MISO
SCK
1
2
3
4
5
6
7
8
9
10 11 20 21 22 23 24 25 26 27 28 29 30
0
2
0
1
3
4
5
6
7
0
1
2
3
13
14
15
...
DATA OUT
MSB
HIGH IMPEDANCE
INSTRUCTION
BYTE ADDRESS
SCK
MOSI
MISO
SSN
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AT43USB326 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Missed Watchdog Timer Reset |
| AT43USB326_06 | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Multimedia USB Keyboard Controller with Embedded Hub |
| AT43USB326-AC | 功能描述:USB 接口集成電路 USB KEYBOARD F/LOGI- TECH - COM TEMP RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| AT43USB326-AU | 功能描述:USB 接口集成電路 USB KEYBOARD FOR LOGITECH - IND TEMP RoHS:否 制造商:Cypress Semiconductor 產(chǎn)品:USB 2.0 數(shù)據(jù)速率: 接口類型:SPI 工作電源電壓:3.15 V to 3.45 V 工作電源電流: 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:WLCSP-20 |
| AT43USB351M | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Missed Watchdog Timer Reset |
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