FT120T-R datasheet(15/40 Pages) FTDI

15 / 40 page

Document No.: FT_000646

FT120 USB DEVICE CONTROLLER WITH PARALLEL BUS IC

Datasheet Version 1.2

Clearance No.: FTDI#

291

Data

: Write 1 byte

Bit

Symbol

Reset

Description

EP_Enable

Enable EP1 and EP2 endpoints (Note EP0 is always

enabled regardless of the setting of EP_Enable bit).

Endpoints can only be enabled when the function is

enabled.

7-1

Reserved

0b’0000000 Reserved, write to 0

Table 6-3 Endpoint Enable Register

6.2.3 Set Mode

Command

: F3h

Data

: Write 2 bytes

Bit

Symbol

Reset

Description

Reserved

Reserved, write to 0

No Suspend Clock

0: CLKOUT switches to 30 KHz during USB suspend

1: CLKOUT remains unchanged during USB suspend

Note: The programmed value will not be changed by a

bus reset.

Clock Running

0: internal clocks stop during USB suspend

1: internal clocks continue running during USB suspend

This bit must be set to ‘0’ for bus powered application in

order to meet the USB suspend current requirement.

Note: The programmed value will not be changed by a

bus reset.

Interrupt Mode

0: interrupt will not generate on NAK or Error

transactions

1: interrupt will generate on NAK and Error transactions

Note: The programmed value will not be changed by a

bus reset.

DP_Pullup

0: Pullup resistor on USBDP pin disabled

1: Pullup resistor on USBDP pin enabled when Vbus is

present

Note: The programmed value will not be changed by a

bus reset.

Reserved

Reserved, write to 0

7-6

Endpoint Configuration

Mode

0b’00

Set the endpoint configuration mode for EP2.

00: Mode 0 (Non-ISO Mode)

01: Mode 1 (ISO-OUT Mode)

10: Mode 2 (ISO-IN Mode)

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