Rainbow-electronics AT89C5122 Manuel d'utilisateur télécharger pdf (Page 122)

122

AT8xC5122/23

4202E–SCR–06/06

Reset Value = XXXX XXXXb

Reset Value = 0000 0000b

Table 71. USB FIFO Data Endpoint X (X=EPNUM set in UEPNUM Register) -

UEPDATX (S:CFh)

76543210

FDAT7 FDAT6 FDAT5 FDAT4 FDAT3 FDAT2 FDAT1 FDAT0

Bit

Number

Bit

Mnemonic Description

7 - 0

FDAT[7:0]

Endpoint X FIFO data

Data byte to be written to FIFO or data byte to be read from the FIFO, for the

Endpoint X (see EPNUM).

Table 72. USB Byte Count Register X (X=EPNUM set in UEPNUM Register) - UBYCTX

(S:E2h)

76543210

- BYCT6 BYCT5 BYCT4 BYCT3 BYCT2 BYCT1 BYCT0

Bit

Number

Bit

Mnemonic Description

7-

Reserved

The value read from these bits is always 0. Do not change this bit.

6 - 0 BYCT[6:0]

Byte Count LSB

Least Significant Byte of the byte count of a received data packet. This byte count

is equal to the number of data bytes received after the Data PID.

1 2 ... 117 118 119 120 121 122 123 124 125 126 127 ... 212 213

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