SAM4L Datasheet, PDF (357/1185 Pages) ATMEL Corporation – ATSAM ARM-based Flash MCU

Figure 17-16. Memory organization
U S B B u ffe rs
Pn BK1
Pn BK0
ATSAM4L4/L2
U S B d e s c rip to rs
B ank1
B ank0
R e s e rv e d
P n_C TR _S TA _B K 1
P n _ P C K S IZ E _ B K 1
Pn_AD D R _BK1
P n_C TR _S TA 1
Pn_C TR _STA_BK0
P n _ P C K S IZ E _ B K 0
Pn_AD D R _BK0
B ank1
B ank0
B ank1
B ank0
R e s e rv e d
P 1_C TR _S TA _B K 1
P 1 _ P C K S IZ E _ B K 1
P1_AD D R _BK1
P 1_C TR _S TA 1
P1_C TR _STA_BK0
P 1 _ P C K S IZ E _ B K 0
P1_AD D R _BK0
R e s e rv e d
P 0_C TR _S TA _B K 1
P 0 _ P C K S IZ E _ B K 1
P0_AD D R _BK1
P 0_C TR _S TA 1
P0_C TR _STA_BK0
P 0 _ P C K S IZ E _ B K 0
P0_AD D R _BK0
+0x03C
+0x038
+0x034
+0x030
+0x02C
+0x028
+0x024
+0x020
+0x01C
+0x018
+0x014
+0x010
+0x00C
+0x008
+0x004
+0x000
UDESCA
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
31
AUTO_ZLP
30:16
15
MULTI_PACKET_SIZE -
14:0
BYTE_COUNT
– AUTO_ZLP: Auto zero length packet, see ”Multi packet mode for OUT pipes” on
page 362.
– MULTI_PACKET_SIZE: see ”Multi packet mode and single packet mode.” on page
346.
– BYTE_COUNT: see ”Multi packet mode and single packet mode.” on page 346.
42023C–SAM–02/2013
357