SH7205 Datasheet, PDF (1293/1904 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

Section 24 USB 2.0 Host/Function Module (USB)
24.4 Operation
24.4.1 System Control
This section describes the register operations that are necessary to the initial settings of this
module, and the registers necessary for power consumption control.
(1) Resets
Table 24.18 lists the types of controller resets. For the initialized states of the registers following
the reset operations, see section 24.3, Register Description.
Table 24.18 Types of Reset
Name
Power-on reset
USB bus reset
Operation
Low level input from the RES pin
Automatically detected by this module from the D+ and D− lines when the
function controller function is selected
(2) Controller Function Selection
This module can select the host controller function or function controller function using the
DCFM bit in SYSCFG0.
This controller selects functions for each USB port as shown in table 24.19.
Table 24.19 Functions Selected for USB Ports
When Host Mode is Selected (DCFM = 1)
PORT0
PORT1
High speed
High speed
Full speed, low speed
Full speed, low speed
High speed
Full speed, low speed
Full speed, low speed
High speed
When Function Mode is Selected (DCFM = 0)
PORT0
PORT1
High speed, full speed Not used
Remarks
Transfer scheduling is common to ports 0
and 1. The outputs of ports 0 and 1 are
driven separately.
Transfer scheduling runs separately for ports
0 and 1, irrespective of their transfer rates.
Remarks
PORT1 is disabled, and low speed is not
supported.
Rev. 1.00 Mar. 25, 2008 Page 1261 of 1868
REJ09B0372-0100