Table of Contents
Advertisement
22 USB 2.0 FS DEVICE CONTROLLER (USB, USBMISC)
CPU interface (user bus interface and peripheral bus interface)
Controls timings of the CPU interface and enables register access.
Notes: • The USB controller hardware provides endpoints and manages transactions. However, it
does not provide a management function in the interface defined for USB (hereinafter re-
ferred to as USB-defined interface). The USB-defined interface should be implemented in the
firmware. According to the device-specific descriptor definition, set endpoints as required
and configure the USB-defined interface using an appropriate endpoint combination.
• This chapter use a general name as shown below to describe the endpoints and the control
registers/bits with the same function that are provided for each endpoint.
EPn: Refers to all endpoints (EP0, EPa, EPb, and EPc), and it is also used for their registers/
bits with the same function.
Example: USBEPnCFG.DIR bit
EPm: Refers to general-purpose endpoints (EPa, EPb, and EPc), and it is also used for their
registers/bits with the same function.
Example: USBEPmCTL.TGLSTAT bit
22.2 Input/Output Pins and External Connections
22.2.1 List of Input/Output Pins
Table 22.2.1.1 lists the USB controller pins.
Pin name
USB_DP
USB_DM
V
BUS
USB18VOUT
USB33VOUT
USB_XI
USB_XO
VBUS_MON
*2
*1 Indicates the status when the pin is configured for the USB controller.
*2 The software should configure the VBUS_MON pin to a general-purpose input port when detecting V
tion, or to the EXSVD1 input of the supply voltage detector when detecting V
If the port is shared with the USB controller pin and other functions, the USB input/output function must be as-
signed to the port before activating the USB controller. For more information, refer to the "I/O Ports" chapter.
22.2.2 External Connections
Figure 22.2.2.1 shows a connection diagram between the USB controller pins of this IC and an external USB de-
vice. The USB_DP pin has a built-in pull up resistor that can be enabled/disabled via software.
22-2
(= USBEP0CFG.DIR, USBEPACFG.DIR, USBEPBCFG.DIR, or USBEPCCFG.DIR bit)
(= USBEPACTL.TGLSTAT, USBEPBCTL.TGLSTAT, or USBEPCCTL.TGLSTAT bit)
USBRWFIFOSEL.EPmRD bit
(= USBRWFIFOSEL.EPARD, USBRWFIFOSEL.EPBRD, or USBRWFIFOSEL.EPCRD bit)
Table 22.2.1.1 List of USB Controller Pins
I/O*
Initial status
I/O
I
I/O
I
P
–
P
–
P
–
A
–
A
–
I
I
Seiko Epson Corporation
*1
USB D+ signal input/output
USB D- signal input/output
USB V
input (5 V can be applied.)
BUS
USB 1.8 V regulator output
USB 3.3 V regulator output
USBOSC oscillator circuit input
USBOSC oscillator circuit output
V
detection input
BUS
BUS
Function
connec-
BUS
voltage drop or disconnection.
S1C31W74 TECHNICAL MANUAL
(Rev. 1.1)
Advertisement
Table of Contents
