參數資料
型號: DSPIC33FJ32GP202T-I/SO
廠商: Microchip Technology
文件頁數: 31/176頁
文件大?。?/td> 0K
描述: IC DSPIC MCU/DSP 32K 28SOIC
產品培訓模塊: Asynchronous Stimulus
標準包裝: 1,600
系列: dsPIC™ 33F
核心處理器: dsPIC
芯體尺寸: 16-位
速度: 40 MIP
連通性: I²C,IrDA,LIN,SPI,UART/USART
外圍設備: 欠壓檢測/復位,POR,PWM,WDT
輸入/輸出數: 21
程序存儲器容量: 32KB(32K x 8)
程序存儲器類型: 閃存
RAM 容量: 2K x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 3.6 V
數據轉換器: A/D 10x12b
振蕩器型: 內部
工作溫度: -40°C ~ 85°C
封裝/外殼: 28-SOIC(0.295",7.50mm 寬)
包裝: 帶卷 (TR)
配用: DV164033-ND - KIT START EXPLORER 16 MPLAB ICD2
DM240001-ND - BOARD DEMO PIC24/DSPIC33/PIC32
其它名稱: DSPIC33FJ32GP202T-I/SOTR
124
AT89C5131
4136C–USB–04/05
Bulk/Interrupt IN Transactions
in Ping-pong Mode
Figure 62. Bulk/Interrupt IN Transactions in Ping-pong Mode
An endpoint will be first enabled and configured before being able to send Bulk or Inter-
rupt packets.
The firmware will fill the FIFO bank 0 with the data to be sent and set the TXRDY bit in
the UEPSTAX register to allow the USB controller to send the data stored in FIFO at the
next IN request concerning the endpoint. The FIFO banks are automatically switched,
and the firmware can immediately write into the endpoint FIFO bank 1.
When the IN packet concerning the bank 0 has been sent and acknowledged by the
Host, the TXCMPL bit is set by the USB controller. This triggers a USB interrupt if
enabled. The firmware will clear the TXCMPL bit before filling the endpoint FIFO bank 0
with new data. The FIFO banks are then automatically switched.
When the IN packet concerning the bank 1 has been sent and acknowledged by the
Host, the TXCMPL bit is set by the USB controller. This triggers a USB interrupt if
enabled. The firmware will clear the TXCMPL bit before filling the endpoint FIFO bank 1
with new data.
The bank switch is performed by the USB controller each time the TXRDY bit is set by
the firmware. Until the TXRDY bit has been set by the firmware for an endpoint bank,
the USB controller will answer a NAK handshake for each IN requests concerning this
bank.
Note that in the example above, the firmware clears the Transmit Complete bit (TXC-
MPL) before setting the Transmit Ready bit (TXRDY). This is done in order to avoid the
firmware to clear at the same time the TXCMPL bit for bank 0 and the bank 1.
The firmware will never write more bytes than supported by the endpoint FIFO.
IN
DATA0 (n Bytes)
ACK
HOST
UFI
C51
Endpoint FIFO Bank 0 - Write Byte 1
IN
NACK
TXCMPL
Endpoint FIFO Bank 0 - Write Byte 2
Endpoint FIFO Bank 0 - Write Byte n
Set TXRDY
Endpoint FIFO Bank 1 - Write Byte 1
Endpoint FIFO Bank 1 - Write Byte 2
Endpoint FIFO Bank 1 - Write Byte m
Set TXRDY
IN
DATA1 (m Bytes)
ACK
Endpoint FIFO Bank 0 - Write Byte 1
Endpoint FIFO Bank 0 - Write Byte 2
Endpoint FIFO Bank 0 - Write Byte p
Set TXRDY
Clear TXCMPL
IN
DATA0 (p Bytes)
ACK
TXCMPL
Clear TXCMPL
Endpoint FIFO Bank 1 - Write Byte 1
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