FT313HP-R datasheet(29/67 Pages) FTDI

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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

This value reflects the current state of the port,

and may not correspond directly to cause the

Connect Status Change bit to be set.

Table 5-11 Port status and control register

5.3 Configuration registers

5.3.1 EOTTIME register (address = 34h)

Bit

Name

Type

Default

value

Description

[31:7]

Reserved

25’h0

U_SUSP_N

R/W

1’b1

Transceiver Suspend Mode

Active low

Places the transceiver in the suspend mode that draws

the minimal power from the power supplies. This is

part of the power management.

[5:4]

EOF2_TIME

R/W

2’b00

EOF 2 Timing Points

Control EOF2 timing point before next SOF.

High-Speed EOF2 Time

00b

2 clocks (30 MHz) = 66 ns

01b

4 clocks (30 MHz) = 133 ns

10b

8 clocks (30 MHz) = 266 ns

11b

16 clocks (30 MHz) = 533 ns

Full-Speed EOF2 Time

00b

20 clocks (30 MHz)=8 clocks (12 MHz) = 666 ns

01b

40 clocks (30 MHz)=16 clocks (12 MHz) = 1.333 µs

10b

80 clocks (30 MHz) = 32 clocks (12 MHz) = 2.66 µs

11b

160 clocks (30 MHz) = 64 clocks (12 MHz) = 5.3 µs

Low-Speed EOF2 Time

00b

40 clocks (30 MHz) = 16 clocks (12 MHz) = 1.33 µs

01b

80 clocks (30 MHz) = 32 clocks (12 MHz) = 2.66 µs

10b 160 clocks (30 MHz) = 64 clocks (12 MHz) = 5.33 µs

11b 320 clocks (30 MHz) = 128 clocks (12 MHz) = 10.66 µs

[3:2]

EOF1_TIME

R/W

2’b00

EOF 1 Timing Points

Controls the EOF1 timing point before next SOF.

This value should be adjusted according to the

maximum packet size.

High-Speed EOF1 Time

00b

540 clocks (30 MHz) = 18 µs

01b

360 clocks (30 MHz) = 12 µs

10b

180 clocks (30 MHz) = 6 µs

11b

720 clocks (30 MHz) = 24 µs

Full-Speed EOF1 Time

00b 1600 clocks (30 MHz) = 640 clocks (12 MHz) = 53.3 µs

01b 1400 clocks (30 MHz) = 560 clocks (12 MHz) = 46.6 µs

10b 1200 clocks (30 MHz) = 480 clocks (12 MHz) = 40 µs

11b 21000 clocks (30 MHz) = 8400 clocks (12 MHz)=700 µs

Low-Speed EOF1 Time

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