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參數(shù)資料
| 型號(hào)： | M30245FCGP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP100 |
| 封裝： | 14 X 14 MM, 0.50 MM PITCH, PLASTIC, LQFP-100 |
| 文件頁(yè)數(shù)： | 243/268頁(yè) |
| 文件大?。?/td> | 2520K |
| 代理商： | M30245FCGP |
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Rev.2.00
Oct 16, 2006
page 74 of 264
M30245 Group
Universal Serial Bus
REJ03B0005-0200
CASE 1: The host sends three 8-byte packets and one 2-byte packet. When the core receives the last 2-byte packet, the
OUT_BUF_RDY flag is set (because of a short packet) indicating the CPU can unload the data. At the end of unloading,
the CPU should clear the OUT_BUF_RDY flag and set the DATA_END. If the host sends more data after this point, the
core returns STALL automatically.
CASE 2: The host sends 6 8-byte packets (anything greater than 3 for this example) and one 2-byte packet (host may
erroneously send 50 bytes instead of 26). The host ACKs each received packet however, it does not automatically return
a STALL because the DATA_END flag is not set when the excessive packets are received. When the CPU retrieves the
data and detects that the data field is greater than the wLength, it sets the SEND_STALL bit for the core to return STALL.
EP1-4 IN (Transmit) FIFO Operation
The CPU writes data to the endpoint's FIFO Data Register. The write pointer automatically increments by 2 in word
accessing mode or increments by 1 in byte accessing mode after a write. The CPU must only write data to the FIFO
Data Register when the IN_BUF_STS1 flag of the corresponding EPx IN CSR is "0". The IN_BUF_STS0 & IN_BUF_STS1
flags are both "1" after a hardware reset or a USB reset, and become "0" when the corresponding endpoint is first
enabled (Endpoints 1-4 IN & OUT are disabled at reset).
The user can program the buffer size and starting location of each IN Endpoint. Users can assign a buffer size up to
1024 bytes in units of 64 bytes to an endpoint. If double buffer mode is selected, the effective buffer size is 2 x buffer
size specified.
Continuous transfer mode is available for IN EP1-4 for Bulk Transfers only. When the continuous transfer mode is
enabled, it is the user’s responsibility to ensure the buffer size is a multiple of the MAXP value.
AUTO_SET function is available for IN EP1-4 for both noncontinuous and continuous modes. When this function is
enabled, if a short packet or a less than buffer size data set is to be transmitted to the host, the CPU must write a "1"
to the SET_IN_BUF_RDY bit to signify the packet (data set) is ready to send.
AUTO_SET and continuous transfer mode are disabled:
Single Buffer Mode:
The CPU writes a "1" to the SET_IN_BUF_RDY bit of the corresponding EPx IN CSR after the CPU finishes writing a data
packet to the buffer (updates the IN_BUF_STS1 & IN_BUF_STS0 flags from 002 to 112). The USB FCU updates the
buffer status flags from 112 to 002 after the data packet has been successfully transmitted to the host.
Double Buffer Mode:
The CPU writes "1" to the SET_IN_BUF_RDY bit of the corresponding EPx IN CSR after the CPU finishes writing a data
packet to the buffer (updates the IN_BUF_STS1 & IN_BUF_STS0 flags).
If the buffer is immediately available to accept another data packet, the buffer status flags transition from 002 to 012.
If the buffer is not available to accept another data packet, the buffer status flags transition from 012 to 112.
The USB FCU updates the buffers status flags after a data packet has been successfully transmitted to the host.
If the buffer has one more data packet in it, the buffer status flags transition from 112 to 012.
If the buffer has no more data packet in it, the buffer status flags transition from 012 to 002.
AUTO_SET is disabled and continuous transfer mode enabled:
Single Buffer Mode:
The CPU writes a "1" to the SET_IN_BUF_RDY bit of the corresponding EPx IN CSR after the CPU finishes writing a
data set up to its buffer size to the buffer (updates the IN_BUF_STS1 & IN_BUF_STS0 flags from 002 to 112). The
USB FCU sends out data packets equal to the MAXP size one at a time, except for the last packet, if the data set in
the buffer is not a multiple of the MAXP, the USB FCU sends a short packet.
The USB FCU updates the buffer status flags from 112 to 002 after the data set has been successfully transmitted to
the host.
相關(guān)PDF資料 |
PDF描述 |
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| M30260M3A-XXXGP-U5 | 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP48 |
| M30260M8A-XXXGP-U5 | 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PQFP48 |
| M30263F6AFP-U7 | 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PDSO42 |
| M30263F6AFP-U7 | 16-BIT, FLASH, 20 MHz, MICROCONTROLLER, PDSO42 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M30245FCGP#U1 | 功能描述:IC M16C/24 MCU FLSH 128K 100LQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - 微控制器， 系列:M16C™ M16C/20 標(biāo)準(zhǔn)包裝:1 系列:87C 核心處理器:MCS 51 芯體尺寸:8-位 速度:16MHz 連通性:SIO 外圍設(shè)備:- 輸入/輸出數(shù):32 程序存儲(chǔ)器容量:8KB（8K x 8） 程序存儲(chǔ)器類型:OTP EEPROM 大小:- RAM 容量:256 x 8 電壓 - 電源 (Vcc/Vdd):4 V ~ 6 V 數(shù)據(jù)轉(zhuǎn)換器:- 振蕩器型:外部 工作溫度:0°C ~ 70°C 封裝/外殼:44-DIP 包裝:管件 其它名稱:864285 |
| M30245FC-XXXFP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30245FC-XXXGF | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30245FC-XXXGP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30245FG | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
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