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ADSP-2192 Peripheral Device Control Registers
USB Endpoint NAK Counter Register
Figure B-7. USB Endpoint NAK Counter Register
15
14
13
12
X
X
X
X
Contains the individual
bits for Endpoints 4-11. This register is read/write by the MCU only.
Table B-40. USB Endpoint NAK Counter Register
NC[3:0]
NAK counter. Number of sequential NAKs that have occurred on a given Endpoint.
When N[3:0] is equal to the base NAK counter NK[3:0] value in the Endpoint Stall
Policy register, a zero-length packet or packet less than maxpacketsize will be issued.
ST
A value of 1 means: Endpoint is stalled
NE
1 = Enable NAK counter 0 = Disable NAK counter
B-80
ADSP-219x/2192 DSP Hardware Reference
11
10
9
8
X
X
X
X
NAK
count, stall control, and
7
6
5
4
X
X
NE
ST
NAK
3
2
1
0
NC
NC
NC
NC
counter enable
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