Rainbow Electronics AT89C5131 - Manual (Page 140)

140
AT89C5131
4136A–USB–03/03
Table 92. UBYCTHX Register
UBYCTHX (S:E3h)
USB Byte Count High Register X (X = EPNUM set in UEPNUM Register UEPNUM
(S:C7h) USB Endpoint Number)
Reset Value = 00h
7 6 5 4 3 2 1 0
- - - - - - BYCT9 BYCT8
Bit Number Bit Mnemonic Description
7-2 -
Reserved
The value read from these bits is always 0. Do not set these bits.
2-0 BYCT[10:8]
Byte Count MSB
Most Significant Byte of the byte count of a received data packet. The Least
significant part is provided by UBYCTLX Register UBYCTLX (S:E2h) USB
Byte Count Low Register X (X = EPNUM set in UEPNUM Register UEPNUM
(S:C7h) USB Endpoint Number) (see Figure 91 on page 139).