AT89C5130A-M_14 Datasheet, PDF (146/188 Pages) ATMEL Corporation – Maximum Core Frequency 48 MHz in X1 Mode, 24 MHz in X2 Mode

Table 21-12. UBYCTHX Register
UBYCTHX (S:E3h)
USB Byte Count High Register X (X = EPNUM set in UEPNUM Register UEP-
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.
Byte Count MSB
Most Significant Byte of the byte count of a received data packet. The Least significant
2-0
BYCT[10:8] 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 21-11 on page 145).
NUM (S:C7h) USB Endpoint Number)
Reset Value = 00h
146 AT89C5130A/31A-M
4337K–USB–04/08