AT89C5131A-RDTIM Atmel, AT89C5131A-RDTIM Datasheet - Page 139
AT89C5131A-RDTIM
Manufacturer Part Number
AT89C5131A-RDTIM
Description
C5131A 32K FLASH USB VQFP64 IND, 5V
Manufacturer
Atmel
Datasheet
1.AT89C5131A-RDTIM.pdf
(176 pages)
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4136C–USB–04/05
Table 94. UEPNUM Register
UEPNUM (S:C7h)
USB Endpoint Number
Reset Value = 00h
Bit Number
7-4
3-0
7
-
Bit Mnemonic Description
EPNUM[3:0]
6
-
-
Reserved
The value read from these bits is always 0. Do not set these bits.
Endpoint Number
Set this field with the number of the endpoint which will be accessed when
reading or writing to, UEPDATX Register UEPDATX (S:CFh) USB FIFO Data
Endpoint X (X = EPNUM set in UEPNUM Register UEPNUM (S:C7h) USB
Endpoint Number), UBYCTLX Register UBYCTLX (S:E2h) USB Byte Count
Low Register X (X = EPNUM set in UEPNUM Register UEPNUM (S:C7h)
USB Endpoint Number), UBYCTHX Register UBYCTHX (S:E3h) USB Byte
Count High Register X (X = EPNUM set in UEPNUM Register UEPNUM
(S:C7h) USB Endpoint Number) or UEPCONX Register UEPCONX (S:D4h)
USB Endpoint X Control Register. This value can be 0, 1, 2, 3, 4, 5 or 6.
5
-
4
-
EPNUM3
3
EPNUM2
2
AT89C5131
EPNUM1
1
EPNUM0
0
137
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