Samsung S5PC110, Руководство пользователя

Страница: 872 / 2426

S5PC110_UM 4 USB 2.0 HOST CONTROLLER
4-6
4.3.2 IMPLEMENTED SPECIFIC REGISTERS
Specific registers allow you to program configurable registers such as the Packet Buffer Depth, Break Memory
Transfer, Frame Length, and UTMI Control and Status Registers Access.
4.3.2.1 Programmable Microframe Base Value (INSNREG00, R/W, Address = 0xEC20_0090)
INSNREG00 Bit Description Initial State
Reserved [31:20] - 0x00000000
- [19] Enables the AHB master interface to utilize burst INCR16 when
appropriate.
•
1'b1 = Use INCR16 when appropriate
•
1'b0 = Do not use INCR16:use other enabled INCRX bursts or
unspecified length burst INCR
-
- [18] Enables the AHB master interface to utilize burst INCR8 when
appropriate.
•
1'b1 = Use INCR8 when appropriate
•
1'b0 = Do not use INCR8:use other enabled INCRX bursts or
unspecified length burst INCR
-
- [17] Enables the AHB master interface to utilize burst INCR4 when
appropriate.
•
1'b1 = Use INCR4 when appropriate
•
1'b0 = Do not use INCR4:use other enabled INCRX bursts or
unspecified length burst INCR
-
- [16] Forces AHB master to start INCR4/8/16 bursts only on burst
boundaries. AHB requires that double word width burst be
addressed aligned only the double word boundary
•
1'b1 = Start INCRX burst only on burst x-aligned addresses
•
1'b0 = Normal AHB operation, start bursts on any double word
boundary
-
- [15] When the OHCI clocks are suspended, the system has to
assert this signal to start the clocks(12 and 48 MHz). This
should be deasserted after the clocks are started and before
the host is suspended again (Host is suspended means HCFS
=SUSPEND or all the OHCI ports are suspended). -
- [14]
•
1'b1 = If the USB port is owned by OHCI, the signal
utmi_suspend_o_n reflects the status of the USB
port(suspended or not suspended)
•
1'b0 = If the USB port is owned by OHCI,
- utmi_suspend_o_n asserts(0) if all the OHCI ports are
suspended or if the OHCI is in global suspend
state(HCFS=USBSUSOPEND)
- utmi_susend_o_n deasserts(1) if any of the OHCI ports are
not suspended and OHCI is not in global suspend.
-
Reserved [13] -
- [12:1] Changes the microframe length value (default is microframe
SOF = 125us) to reduce the simulation time. This value is used
as 1-microframe counter with word interface (16-bits). -