FT120T-R datasheet(18/40 Pages) FTDI

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Document No.: FT_000646

FT120 USB DEVICE CONTROLLER WITH PARALLEL BUS IC

Datasheet Version 1.2

Clearance No.: FTDI#

291

6.3 Data Flow Commands

6.3.1 Read Interrupt Register

Command

: F4h

Data

: Read 1 or 2 bytes

Bit

Symbol

Reset

Description

Endpoint 0 Out

Interrupt for endpoint 0 OUT buffer. Cleared by Read

Last Transaction Status command.

Endpoint 0 In

Interrupt for endpoint 0 IN buffer. Cleared by Read Last

Transaction Status command.

Endpoint 1 Out

Interrupt for endpoint 1 OUT buffer. Cleared by Read

Last Transaction Status command.

Endpoint 1 In

Interrupt for endpoint 1 IN buffer. Cleared by Read Last

Transaction Status command.

Endpoint 2 Out

Interrupt for endpoint 2 OUT buffer. Cleared by Read

Last Transaction Status command.

Endpoint 2 In

Interrupt for endpoint 2 IN buffer. Cleared by Read Last

Transaction Status command.

Bus Reset

Interrupt for bus reset. This bit will be cleared after

reading.

Suspend Change

Interrupt for USB bus suspend status change. This bit

will be set to ‘1’ when FT120 goes to suspend (missing 3

continuous SOFs) or resumes from suspend. This bit will

be cleared after reading.

Table 6-7 Interrupt Register Byte 1

Bit

Symbol

Reset

Description

DMA EOT

Interrupt for end of DMA transfer. This bit will be cleared

after reading.

Reserved

0b’xxxxxxx Reserved

Table 6-8 Interrupt Register Byte 2

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