51.29 Universal Serial Bus (USB) Electrical Specifications
AC CHARACTERISTICS | Standard
Operating Conditions: VDDIO 3.0V to 3.6V (unless otherwise stated)
Operating temperature: -40°C ≤ TA ≤ +85°C for Industrial | ||||||
---|---|---|---|---|---|---|---|
Param. No. | Symbol | Characteristics (1) | Min. | Typ. | Max. | Units | Conditions |
USB_1 | VDDUSB (4) | USB Transceiver Voltage | 3 | — | 3.6 | V | Voltage on VDDIOx must be in this range for proper USB operation |
Clocks | |||||||
USB_23 | USBFSCLKS (2) | USBFS Clock Source | — | 48 | — | MHz | fGCLK_USBFS = 48 MHz |
USB_24 | USBHSCLKS (3) | USBHS Clock Source | — | 12 or 24 | — | MHz | — |
USB_25 | USBFSAHB | Min. AHB Clock for USBFS Operations | 12 | — | — | MHz | — |
USB_26 | USBHSAHB | Min. AHB Clock for USBHS Operations | 60 | — | — | MHz | — |
Note:
|
USBFS Clock configuration | Standard
Operating Conditions: VDDIO 3.0V to 3.6V (unless otherwise stated)
Operating temperature: -40°C ≤ TA ≤ +85°C for Extended Temp | |||
---|---|---|---|---|
Param. No. | Symbol | Characteristics | Device mode operation. | Host mode operation. |
USB_30 | USBFS_GCLK_SRC | DFLL48M Open loop | No | No |
DFLL48M Close loop, Ref. internal OSC source | No | No | ||
DFLL48M Close loop, Ref. external XOSC / XOSC32K source | Yes | No | ||
DFLL48M Close loop, Ref. SOF (USB recovery mode) | Yes | N/A | ||
PLL internal OSC (DFLL48M) | No | No | ||
PLL external XOSC | Yes | Yes | ||
XOSC Crystal | Yes | Yes |