Document No.: FT_000589
FT313H USB2.0 HS Host Controller Datasheet Version 1.1
Clearance No.: FTDI# 318
Bit
Name
Type
Default value
Description
Note1: This is further gated by MIN_WIDTH bits
of EDGEINTC register if edge trigger interrupt is
used.
Note2: In the full-speed mode, these registers
are reserved.
[15:12]
11
Reserved
RO
4’b0
-
Asynchronous Schedule Park Mode Enable
ASYN_PK_EN
R/W
1’b1
Software uses this register to enable or disable
the Park mode. When this register is set to ‘1’,
the Park mode is enabled.
10
Reserved
RO
1’b0
-
Asynchronous Schedule Park Mode Count
[9:8]
ASYN_PK_CNT R/W
2’b11
This field contains a count for the number of
successive transactions that the host controller
is allowed to execute from a high-speed queue
head on the asynchronous schedule.
7
6
Reserved
RO
1’b0
1’b0
-
Interrupt on Asynchronous Advance
Doorbell
INT_OAAD
R/W
This bit is used as a doorbell by software to ring
the host controller to issue an interrupt at the
next advance of the asynchronous schedule.
Asynchronous Schedule Enable
5
ASCH_EN
R/W
1’b0
This bit controls whether the host controller
skips the processing of asynchronous schedule.
0: Do not process the asynchronous schedule
1: Use the ASYNCLISTADDR register to access
the asynchronous schedule
Periodic Schedule Enable
4
PSCH_EN
R/W
1’b0
This bit controls whether the host controller
skips the processing of the periodic schedule.
0: Do not process the periodic schedule
1: Use the PERIODICKISTBASE register to
access the periodic schedule
Frame List Size
[3:2]
FRL_SIZE
HC_RESET
R/W
R/W
2’b00
This field specifies the size of the frame list.
00: 1024 elements (4096 bytes; default value)
01: 512 elements (2048 bytes)
10: 256 elements (1024 bytes)
11: Reserved
Host Controller Reset
1
1’b0
This control bit is used by the software to reset
the host controller.
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23
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