7641 datasheet(52/138 Pages) RENESAS

52 / 138 page

7641 Group

Rev.4.00

Aug 28, 2006

page 52 of 135

REJ03B0191-0400

[USB Frame Number Registers Low and High ]

USBSOFL, USBFOFH

These 11-bit registers contain the frame number of the SOF token

received from the host computer. These are read-only registers.

[USB Endpoint Index Register] USBINDEX

This register specifies the accessible endpoint. It serves as an in-

dex to endpoint-specific USB Endpoint x IN Control Register, USB

Endpoint x OUT Control Register, USB Endpoint x IN Max. Packet

Size Register, USB Endpoint x OUT Max. Packet Size Register,

USB Endpoint x OUT Write Count Register, and USB FIFO Mode

Selection Register (x = 0 to 4).

USB frame number register Low (address 005616)

USBSOFL

Low-order 8 bits of SOF token

High-order 3 bits of SOF token

Reserved bit (“0” at read)

USB frame number register High (address 005716)

USBSOFH

USB endpoint index register (address 005816)

USBINDEX

Endpoint index bit (EPINDEX)

b2b1b0

0 0 0: Endpoint 0

0 0 1: Endpoint 1

0 1 0: Endpoint 2

0 1 1: Endpoint 3

1 0 0: Endpoint 4

1 0 1: Not used

1 1 0: Not used

1 1 1: Not used

Reserved bit (“0” at read/write)

AUTO_FLUSH bit (AUTO_FL)

0: Auto FIFO flush disabled

1: Auto FIFO flush enabled

ISO_UPDATE bit (ISO_UPD)

0: ISO_UPDATE disabled

1: ISO_UPDATE enabled

000

Fig. 44 Structure of USB frame number registers

Fig. 45 Structure of USB frame number registers

7641 Datasheet(PDF) 52 Page - Renesas Technology Corp

7641 Datasheet(HTML) 52 Page - Renesas Technology Corp

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

Datasheet Download

Link URL