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Section 26 USB 2.0 Host/Function Module
R01UH0134EJ0400 Rev. 4.00 Page 1397 of 2108
Sep 24, 2014
SH7262 Group, SH7264 Group
Bit Bit Name
Initial
Value R/W Description
12 DTCH 0 R/W*
1
USB Disconnection Detection Interrupt Status
Indicates the status of the USB disconnection
detection interrupt when the host controller function
is selected.
0: DTCH interrupts not generated
1: DTCH interrupts generated
This module detects the DTCH interrupt on detecting
USB bus disconnection, and sets this bit to 1. Here, if
the corresponding interrupt enable bit has been set
to 1, this module generates the interrupt. This
module detects bus disconnection based on USB
Specification 2.0.
After detecting the DTCH interrupt, this module
controls hardware as described below (irrespective
of the set value of the corresponding interrupt enable
bit). Terminate all the pipes in which communications
are currently carried out for the USB port and make a
transition to the wait state for bus connection to the
USB port (wait state for ATTCH interrupt generation).
(1) Modifies the UACT bit to 0.
(2) Causes a transition to the idle state.
When the function controller function is selected, the
read value is invalid.