FT313HQ-R datasheet(23/67 Pages) ETC2

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Document No.: FT_000589

FT313H USB2.0 HS Host Controller Datasheet Version 1.2

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]

Reserved

4’b0

ASYN_PK_EN

R/W

1’b1

Asynchronous Schedule Park Mode Enable

Software uses this register to enable or disable

the Park mode. When this register is set to ‘1’,

the Park mode is enabled.

Reserved

1’b0

[9:8]

ASYN_PK_CNT

R/W

2’b11

Asynchronous Schedule Park Mode Count

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.

Reserved

1’b0

INT_OAAD

R/W

1’b0

Interrupt on Asynchronous Advance

Doorbell

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.

ASCH_EN

R/W

1’b0

Asynchronous Schedule Enable

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

PSCH_EN

R/W

1’b0

Periodic Schedule Enable

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

[3:2]

FRL_SIZE

R/W

2’b00

Frame List Size

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

HC_RESET

R/W

1’b0

Host Controller Reset

This control bit is used by the software to reset

the host controller.

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