Cypress CY7C67200 manual Host n Count Result Register R, Host n Device Address Register W

Models: CY7C67200

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Host n Count Result Register [R]

CY7C67200

Host n Count Result Register [R]

Host 1 Count Result Register 0xC088

Host 2 Count Result Register 0xC0A8

Figure 23. Host n Count Result Register

Bit #

15

14

13

12

 

11

10

9

8

Field

 

 

 

 

Result...

 

 

 

Read/Write

R

R

R

R

 

R

R

R

R

Default

0

0

0

0

 

0

0

0

0

 

 

 

 

 

 

 

 

 

 

Bit #

7

6

5

4

 

3

2

1

0

Field

 

 

 

 

...Result

 

 

 

Read/Write

R

R

R

R

 

R

R

R

R

Default

0

0

0

0

 

0

0

0

0

 

 

 

 

 

 

 

 

 

 

Register Description

The Host n Count Result register is a read-only register that contains the size difference in bytes between the Host Count Value specified in the Host n Count register and the last packet received. If an overflow or underflow condition occurs, that is the received packet length differs from the value specified in the Host n Count register, the Length Exception Flag bit in the Host n Endpoint Status register will be set. The value in this register is only valid when the Length Exception Flag bit is set and the Error Flag bit is not set; both bits are in the Host n Endpoint Status register.

Result (Bits [15:0])

The Result field contains the differences in bytes between the received packet and the value specified in the Host n Count register. If an overflow condition occurs, Result [15:10] is set to ‘111111’, a 2’s complement value indicating the additional byte count of the received packet. If an underflow condition occurs, Result [15:0] indicates the excess byte count (number of bytes not used).

Reserved

All reserved bits must be written as ‘0’.

Host n Device Address Register [W]

Host 1 Device Address Register 0xC088

Host 2 Device Address Register 0xC0A8

Figure 24. Host n Device Address Register

Bit #

15

14

13

12

 

11

10

9

8

Field

 

 

 

 

Reserved...

 

 

 

Read/Write

-

-

-

-

 

-

-

-

-

Default

0

0

0

0

 

0

0

0

0

 

 

 

 

 

 

 

 

 

 

Bit #

7

6

5

4

3

2

1

0

Field

...Reserved

 

 

 

Address

 

 

 

Read/Write

-

W

W

W

W

W

W

W

Default

0

0

0

0

0

0

0

0

 

 

 

 

 

 

 

 

 

Register Description

The Host n Device Address register is a write-only register that contains the USB Device Address that the host wishes to communicate with.

Address (Bits [6:0])

The Address field contains the value of the USB address for the next device that the host is going to communicate with. This value must be written by firmware.

Reserved

All reserved bits must be written as ‘0’.

Document #: 38-08014 Rev. *G

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Cypress CY7C67200 manual Host n Count Result Register R, Host n Device Address Register W