参数资料
型号: IT80C51-12D
厂商: ATMEL CORP
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP44
封装: 1 MM HEIGHT, QFP-44
文件页数: 47/109页
文件大小: 10824K
代理商: IT80C51-12D
290
7593L–AVR–09/12
AT90USB64/128
Figure 24-4. Example with OUT data banks.
24.14 IN Pipe management
The Pipe must be configured first.
When the Host requires data from the device, the firmware has to determine first the IN mode to
use using the INMODE bit:
INMODE = 0. The INRQX register is taken in account. The Host controller will perform
(INRQX+1) IN requests on the selected Pipe before freezing the Pipe. This mode avoids to
have extra IN requests on a Pipe
INMODE = 1. The USB controller will perform infinite IN request until the firmware freezes the
Pipe
The IN request generation will start when the firmware clear the PFREEZE bit.
Each time the current bank is full, the RXIN and the FIFOCON bits are set. This triggers an inter-
rupt if the RXINE bit is set. The firmware can acknowledge the USB interrupt by clearing the
RXIN bit. The Firmware read the data and clear the FIFOCON bit in order to free the current
OUT
DATA
(bank 0)
ACK
TXOUT
FIFOCON
HW
Example with 1 OUT data bank
write data from CPU
BANK 0
Example with 2 OUT data banks
SW
OUT
DATA
(bank 0)
ACK
TXOUT
FIFOCON
write data from CPU
BANK 0
SW
OUT
DATA
(bank 1)
ACK
write data from CPU
BANK 0
write data from CPU
BANK 1
SW
HW
write data from CPU
BANK0
Example with 2 OUT data banks
OUT
DATA
(bank 0)
ACK
TXOUT
FIFOCON
write data from CPU
BANK 0
SW
write data from CPU
BANK 1
SW
HW
write data from CPU
BANK0
OUT
DATA
(bank 1)
ACK
相关PDF资料
PDF描述
IT80C31-25D 8-BIT, 25 MHz, MICROCONTROLLER, PQFP44
IF280C51C-36R 8-BIT, MROM, 36 MHz, MICROCONTROLLER, PQFP44
IV80C32-L16R 8-BIT, 16 MHz, MICROCONTROLLER, PQFP44
IQ80C52TXXX-L16D 8-BIT, MROM, 16 MHz, MICROCONTROLLER, CQFP44
IR80C52TXXX-20R 8-BIT, MROM, 20 MHz, MICROCONTROLLER, CQCC44
相关代理商/技术参数
参数描述
IT80C51-16 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller
IT80C51-20 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller
IT80C51-25 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller
IT80C51-30 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller
IT80C51-36 制造商:未知厂家 制造商全称:未知厂家 功能描述:8-Bit Microcontroller