參數(shù)資料
型號: M30240M6-XXXFP
元件分類: 微控制器/微處理器
英文描述: 16-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP80
封裝: 0.80 MM PITCH, PLASTIC, QFP-80
文件頁數(shù): 37/139頁
文件大?。?/td> 1453K
代理商: M30240M6-XXXFP
131
Mitsubishi microcomputers
M30240 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Specifications REV. G
Specifications in this manual are tentative and subject to change
Frequency Synthesizer
1.5 Applications
1.5.1 Frequency Synthesizer
This section presents the recommended method of setting up and using the frequency synthesizer that
generates the 48MHz clock needed by the USB FCU and the DC-DC converter that provides power to
the D+/D- drivers.
1.5.1.1 Reset of USB-related registers
The special function registers (SFRs) that govern the operation of the frequency synthesizer, DC-DC
converter and USB FCU are affected by one or more reset events. The addresses of the special function
registers (SFRs) that are affected by Hardware Reset, USB Reset, or both are shown in Figure 1.116.
Figure 1.116: SFR Reset Venn Diagram
All resetable SFRs, including SFRs and other registers internal to the USB FCU, are affected by a
Hardware Reset, which occurs when the RESET pin is brought low or an undefined opcode is fetched.
See Section 2.4 for a complete listing of SFRs and their reset values.
Only registers internal to the USB FCU are reset when a USB Reset sent by the Host/Hub is detected.
These USB registers are reset to their default values except for bit 5 of USBIS2 (USB Reset Interrupt
Status Flag), which is set to a “1”. USB FCU registers are registers from address 030016to 033C16 and
all other registers within the USB FCU, many of which the MCU does not have direct access to (e.g.
FIFO address pointers). The USB FIFO registers are empty after USB reset because the FIFO ad-
dress pointers are reset. However, the physical contents of the FIFOs are not set to all ‘1‘s or all ‘0‘s.
Other SFRs such as USBC, FSC, and CM0, CM1 are not affected by a USB Reset.
Hardware Reset
USB Reset
SFR Registers:
000416 to 005F16,
037816 to 03FF16
000C (USBC),
03DC16 (FSC)
SFR Registers:
030016 to 033C16
(USB FCU registers)
相關(guān)PDF資料
PDF描述
M30240M6-XXXFP 16-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP80
M30240M5-XXXFP 16-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP80
M30240M6-XXXXFP 16-BIT, MROM, 12 MHz, MICROCONTROLLER, PQFP80
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