参数资料
型号: M37641F8HP
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 24 MHz, MICROCONTROLLER, PQFP80
封装: 12 X 12 MM, 0.50 MM PITCH, PLASTIC, LQFP-80
文件页数: 85/136页
文件大小: 1672K
代理商: M37641F8HP
52
7641 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
[USB Frame Number Registers Low and High ]
USBSOFL, USBFOFH
These 11-bit registers contain the frame number of the SOF token
received from the host computer. These are read-only registers.
[USB Endpoint Index Register] USBINDEX
This register specifies the accessible endpoint. It serves as an in-
dex to endpoint-specific USB Endpoint x IN Control Register, USB
Endpoint x OUT Control Register, USB Endpoint x IN Max. Packet
Size Register, USB Endpoint x OUT Max. Packet Size Register,
USB Endpoint x OUT Write Count Register, and USB FIFO Mode
Selection Register (x = 0 to 4).
USB frame number register Low (address 005616)
USBSOFL
Low-order 8 bits of SOF token
High-order 3 bits of SOF token
Reserved bit (“0” at read)
USB frame number register High (address 005716)
USBSOFH
b0
b7
b0
b7
USB endpoint index register (address 005816)
USBINDEX
Endpoint index bit (EPINDEX)
b2b1b0
0 0 0: Endpoint 0
0 0 1: Endpoint 1
0 1 0: Endpoint 2
0 1 1: Endpoint 3
1 0 0: Endpoint 4
1 0 1: Not used
1 1 0: Not used
1 1 1: Not used
Reserved bit (“0” at read/write)
AUTO_FLUSH bit (AUTO_FL)
0: Auto FIFO flush disabled
1: Auto FIFO flush enabled
ISO_UPDATE bit (ISO_UPD)
0: ISO_UPDATE disabled
1: ISO_UPDATE enabled
b0
b7
000
Fig. 44 Structure of USB frame number registers
Fig. 45 Structure of USB frame number registers
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