2–16

2.6.4

USBCTL: USB Control Register

Unlike the other registers, this register is cleared by the power-up-reset signal only. The USB-reset cannot reset this

register. (See Figure 2–3: Reset Diagram)

7

6

5

4

3

210

CONT

RSV

RWUP

FRSTE

RWE

B/S

SIR

DIR

R/W

R/O

R/W

R/W

R/W

R/W

R/W

R/W

BIT

NAME

RESET

FUNCTION

0

DIR

0

As a response to a setup packet, the MCU will decode the request and set or clear this bit to reflect the data

transfer direction.

DIR = 0 > USB data OUT transaction. (From host to TUSB3210)

DIR = 1 > USB data IN transaction. (From TUSB3210 to host)

1

SIR

0

SETUP interrupt status bit. This bit is controlled by the MCU to indicate to the hardware when SETUP

interrupt is being served.

SIR = 0

SETUP interrupt is not served. MCU will clear this bit before exiting the SETUP interrupt

routine.

SIR = 1

SETUP interrupt is in progress. MCU will set this bit when servicing the SETUP interrupt.

2

B/S

0

Bus/Self power control bit

B/S = 0 > The device is bus-powered

B/S = 1 > The device is self-powered

3

RWE

0

Remote wake-up enable bit.

RWE = 0

MCU clears it when host sends command to clear the feature.

RWE = 1

MCU writes 1 to it when host sends set device feature command to enable remote wake-up

feature

4

FRSTE

1

Function reset connection bit. This bit connects/disconnects the USB function reset from the MCU reset.

FRSTE = 0 function reset is not connected to MCU reset

FRSTE = 1 function reset is connected to MCU reset

5

RWUP

0

Device remote wake-up request. This bit is set by MCU and is cleared automatically.

RWUP = 0

Writing a 0 to this bit has no effect.

RWUP = 1

When MCU writes a 1, a Remote wake-up pulse is generated.

6

RSV

0

Reserved

7

CONT

0

Connect/Disconnect Bit

CONT = 0 Upstream port is disconnected. Pullup disabled

CONT = 1 Upstream port is connected. Pullup enabled

2.6.5

VIDSTA: VID/PID Status Register

This register is used to read the value on four external pins. The firmware can use this value to select one of the vendor

identification/product identifications (VID/PID) stored in memory. The TUSB3210/D supports up to 16 unique

VID/PIDs with application code to support different products. This provides a unique opportunity for original

equipment manufacturers (OEM) to have one device ROM programmed to support up to 16 different product lines

by using S0–S3 to select VID/PID and behavioral application code for the selected product.

7

6

5

4

3

210

RSV

RSV

RSV

RSV

S3

S2

S1

S0

R/O

R/O

R/O

R/O

R/O

R/O

R/O

R/O

BIT

NAME

RESET

FUNCTION

3–0

S[3:0]

x

VID/PID selection bits. These bits reflect the status of the external pins as defined by Table 2–7. Note that a

pin tied Low will be reflected as 0 and a pin tied high will be reflected as a 1.

7–4

RSV

0

Reserved = 0