ISD94100 Series Technical Reference Manual
Sep 9, 2019
Page
853
of 928
Rev1.09
IS
D
9
410
0
S
ER
IE
S
T
E
C
HN
ICA
L
RE
F
E
RE
NCE
M
AN
U
AL
USB Endpoint Status Register 0 (USBD_EPSTS0)
Register
Offset
R/W Description
Reset Value
USBD_EPSTS0
0x020
R
USB Device Endpoint Status Register 0
0x0000_0000
31
30
29
28
27
26
25
24
EPSTS7
EPSTS6
23
22
21
20
19
18
17
16
EPSTS5
EPSTS4
15
14
13
12
11
10
9
8
EPSTS3
EPSTS2
7
6
5
4
3
2
1
0
EPSTS1
EPSTS0
Bits
Description
[31:28]
EPSTS7
Endpoint 7 Status
These bits are used to indicate the current status of this endpoint
0000 = In ACK.
0001 = In NAK.
0010 = Out Packet Data0 ACK.
0011 = Setup ACK.
0110 = Out Packet Data1 ACK.
0111 = Isochronous transfer end.
[27:24]
EPSTS6
Endpoint 6 Status
These bits are used to indicate the current status of this endpoint
0000 = In ACK.
0001 = In NAK.
0010 = Out Packet Data0 ACK.
0011 = Setup ACK.
0110 = Out Packet Data1 ACK.
0111 = Isochronous transfer end.
[23:20]
EPSTS5
Endpoint 5 Status
These bits are used to indicate the current status of this endpoint
0000 = In ACK.
0001 = In NAK.
0010 = Out Packet Data0 ACK.
0011 = Setup ACK.
0110 = Out Packet Data1 ACK.
0111 = Isochronous transfer end.
[19:16]
EPSTS4
Endpoint 4 Status
These bits are used to indicate the current status of this endpoint