ST7SCR_07 datasheet(54/101 Pages) STMICROELECTRONICS

54 / 101 page

ST7SCR

54/101

USB INTERFACE (Cont’d)

RECEPTION COUNTER REGISTER (CNT0RXR)

Read/Write

Reset Value: 0000 0000 (00h)

This register contains the allocated buffer size for

endpoint

reception,

setting

the

maximum

number of bytes the related endpoint can receive

with the next OUT or SETUP transaction. At the

end of a reception, the value of this register is the

max size decremented by the number of bytes re-

ceived (to determine the number of bytes re-

ceived, the software must subtract the content of

this register from the allocated buffer size).

TRANSMISSION COUNTER REGISTER

(CNT0TXR, CNT1TXR, CNT3TXR, CNT4TXR,

CNT5TXR)

Read/Write

Reset Value 0000 0000 (00h)

This register contains the number of bytes to be

transmitted by Endpoint 0, 1, 3, 4 or 5 at the next

IN token addressed to it.

RECEPTION COUNTER REGISTER (CNT2RXR)

Read/Write

Reset Value: 0000 0000 (00h)

This register contains the allocated buffer size for

endpoint

reception,

setting

the

maximum

number of bytes the related endpoint can receive

with the next OUT transaction. At the end of a re-

ception, the value of this register is the max size

decremented by the number of bytes received (to

determine the number of bytes received, the soft-

ware must subtract the content of this register from

the allocated buffer size).

TRANSMISSION COUNTER REGISTER

(CNT2TXR)

Read/Write

Reset Value 0000 0000 (00h)

This register contains the number of bytes to be

transmitted by Endpoint 2 at the next IN token ad-

dressed to it.

CNT3 CNT2 CNT1 CNT0

CNT6 CNT5 CNT4 CNT3 CNT2 CNT CNT0

CNT6 CNT5 CNT4 CNT3 CNT2 CNT1 CNT0

ST7SCR Datenblatt(PDF) 54 Page - STMicroelectronics

ST7SCR Datenblatt(HTML) 54 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datenblatt Download

Link URL