TH6503 datasheet(13/24 Pages) ETC

13 / 24 page

TH6503 USB Low-Speed Interface

USBFlagRegister (write only)

Internal address: b101

Size:

8 bits

Description

(continued)

USBAddressRegister (write only)

Internal address: b110

Size:

8 bits

Bit

Number

Bit

Mnemonic

Reset

Status

Function

FI2

Flush EP2 IN

clears EP2 FIFO

is set and reset automatically depending on the actual FIFO Status

must be set before EP2 of the EP1/2 FIFO can be overwritten by the

microcontroller

FI1

Flush EP1 IN

clears EP1 FIFO

is set and reset automatically depending on the actual FIFO Status

must be set before EP1 of the EP1/2 FIFO can be overwritten by the

microcontroller

FI0

Flush EP0 IN

clears EP0 FIFO

is set and reset automatically depending on the actual FIFO Status

must be set before the EP0 FIFO can be overwritten by the

microcontroller

BO0

Busy OUT

blocks the EP0 OUT FIFO for the USB host

is set and reset automatically depending on the actual FIFO Status

TH6503 responds with no handshake for a USB host SETUP token or

with a NAK signal for an OUT token (NAK state)

to leave the NAK state, the microcontroller does an OutFIFO read

(the microcontroller rereads the last data)

SI2

STALL EP2

sets EP2 to STALL

TH6503 responds with a STALL for a USB host IN or OUT token

if address and EP2 have been decoded

only operative if EP2 is active

SI1

STALL EP1

sets EP1 to STALL

TH6503 responds with a STALL for a USB host IN or OUT token

if address and EP1 have been decoded

only operative if EP1 is active

SI0

STALL EP0 IN

sets EP0 IN to STALL

TH6503 responds with a STALL for a USB host IN token

if address and EP0 have been decoded

will be cleared after SETUP token

SO0

STALL EP0 OUT

sets EP0 OUT to STALL

TH6503 responds with a STALL for a USB host OUT token

if address and EP0 have been decoded

STALL is inoperative for a SETUP token from the USB host

SETUP clears STALL EP0 IN and STALL EP0 OUT bits

Bit

Number

Bit

Mnemonic

Reset

Status

Function

reserved

6-0

AD6-0

USB device address

USB address entered by microcontroller

zero after reset

microcontroller must decode the address from descriptor data after a

SETUP (SET_ADDRESS) token and write it in this register

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