Usb Control Registers 0 And 1 (Usbcr0, Usbcr1) - Renesas H8S/2158 User Manual

Section 18 Universal Serial Bus Interface (USB)

18.3.16 USB Control Registers 0 and 1 (USBCR0, USBCR1)

USBCR0 selects the USB module data input/output method and controls the operation states and
reset states of each unit. USBCR1 controls clock supply to the bus driver/receiver and USB
function core.
USBCR0 is initialized to H'7F by a system reset.
USBCR1 is initialized to H'00 by a system reset.
USBCR0
Bit Bit Name Initial Value R/W
7 FADSEL 0
6, 5 — All 1
4 UIFRST 1
3, 2 — All 1
Rev. 3.00 Jan 25, 2006 page 592 of 872
REJ09B0286-0300
Description
R/W Function Input/Output Analog 1 Digital Selection
Selects the USB module data input/output method.
0: Selects the USDP and USDM pins as USB module
data input/output.
1: Multiplexes the control input/output of the
driver/receiver that is compatible with PDIUSBP11A
manufactured by Philips Electronics with port 6 pins
and selects it as USB module data input/output (see
table 18.3).
R Reserved
These bits are always read as 1 and cannot be modified.
R/W USB Interface Software Reset
Resets EP4PKTSZR, EPSZR1, USBIER0, USBIER1,
USBMDCR, EPDIR0, and INTSELR0.
0: Sets the above registers in operating state.
1: Sets the above registers in reset state.
R Reserved
These bits are always read as 1 and cannot be modified.