TUSB3410 datasheet(82/92 Pages) TI

82 / 92 page

11–12

11.8.5 I2C Memory Read

The bootcode returns the content of the specified address in I2C EEPROM.

In the wValue field, the I2C device number is from 0x00 to 0x07 in high filed. The memory type is from 0x01 to 0x03

for CAT I to CAT III devices. If bit 7 of bValueL is set, then 400 kHz is used. Otherwise, 100 kHz is used. This request

is also used to set the device number and speed before the I2C write request.

bmRequestType

USB_REQ_TYPE_DEVICE |

USB_REQ_TYPE_VENDOR |

USB_REQ_TYPE_IN

11000000b

bRequest

BTC_I2C_MEMORY_READ

0x92

wValue

HI:

I2C device number

LO:

Memory type bit[1:0]

Speed bit[7]

0xXXYY

wIndex

Data address

0xNNNN (From 0x0000 to 0xFFFF)

wLength

1 byte

0x0001

Data

Byte in the specified address

0xNN

11.8.6 I2C Memory Write

The I2C memory write command tells the bootcode to write data to the specified address. The SPI mode setting is

done in the SPI read command.

bmRequestType

USB_REQ_TYPE_DEVICE |

USB_REQ_TYPE_VENDOR |

USB_REQ_TYPE_OUT

01000000b

bRequest

BTC_I2C_MEMORY_WRITE

0x93

wValue

HI: should be zero

LO: Data

0x00NN

wIndex

Data address

0xNNNN (From 0x0000 to 0xFFFF)

wLength

None

0x0000

Data

None

11.8.7 Internal ROM Memory Read

The bootcode returns the byte of the specified address in ROM. That is, the binary code of the bootcode.

bmRequestType

USB_REQ_TYPE_DEVICE |

USB_REQ_TYPE_VENDOR |

USB_REQ_TYPE_OUT

01000000b

bRequest

BTC_INTERNAL_ROM_MEMORY_READ

0x94

wValue

None

0x0000

wIndex

Data address

0xNNNN (From 0x0000 to 0xFFFF)

wLength

1 byte

0x0001

Data

Byte in the specified address

0xNN

TUSB3410 датащи(PDF) 82 Page - Texas Instruments

TUSB3410 датащи(HTML) 82 Page - Texas Instruments

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

датащи скачать

ссылки URL