Atmel SAM4L Xplained Pro Evaluation Kit Atmel ATSAM4L-XPRO ATSAM4L-XPRO Data Sheet
Product codes
ATSAM4L-XPRO
363
42023E–SAM–07/2013
ATSAM4L8/L4/L2
Figure 17-16. Memory organization
Each pipe n descriptor bank consists of four words.
• The address of the pipe and bank used (Pn_ADDR_BK0/1).
• The packet size information for the pipe and bank (Pn_PCKSIZE_BK0/1):
Table 17-5.
Pn_PCKSIZE_BK0/1 structure
– AUTO_ZLP: Auto zero length packet, see
.
– MULTI_PACKET_SIZE: see
.
– BYTE_COUNT: see
.
31
30:16
15
14:0
AUTO_ZLP
MULTI_PACKET_SIZE
-
BYTE_COUNT
P n B K 0
P 0 _ C T R _ S T A _ B K 0
P 0 _ P C K S I Z E _ B K 0
P 0 _ A D D R _ B K 0
U D E S C A
Gr
ow
ing
Memor
ow
ing
Memor
y
A
ddr
es
ses
ses
De
scr
ip
scr
ip
to
r P
0
0
P 0 _ C T R _ S T A 1
P 0 _ C T R _ S T A _ B K 1
P 0 _ P C K S I Z E _ B K 1
P 0 _ A D D R _ B K 1
R e s e r v e d
B a n k 0
B a n k 1
+ 0 x 0 0 0
+ 0 x 0 0 4
+ 0 x 0 0 8
+ 0 x 0 0 C
+ 0 x 0 1 0
+ 0 x 0 1 4
+ 0 x 0 1 8
+ 0 x 0 1 C
P 1 _ C T R _ S T A _ B K 0
P 1 _ P C K S I Z E _ B K 0
P 1 _ A D D R _ B K 0
Desc
ri
p
to
r P1
P 1 _ C T R _ S T A 1
P 1 _ C T R _ S T A _ B K 1
P 1 _ P C K S I Z E _ B K 1
P 1 _ A D D R _ B K 1
R e s e r v e d
B a n k 0
B a n k 1
+ 0 x 0 2 0
+ 0 x 0 2 4
+ 0 x 0 2 8
+ 0 x 0 2 C
+ 0 x 0 3 0
+ 0 x 0 3 4
+ 0 x 0 3 8
+ 0 x 0 3 C
P n _ C T R _ S T A _ B K 0
P n _ P C K S I Z E _ B K 0
P n _ A D D R _ B K 0
P n _ C T R _ S T A 1
P n _ C T R _ S T A _ B K 1
P n _ P C K S I Z E _ B K 1
P n _ A D D R _ B K 1
R e s e r v e d
B a n k 0
B a n k 1
De
scr
ip
scr
ip
to
r Pn
P n B K 1
U S B d e s c r i p t o r s
U S B B u f f e r s