Table of Contents
Advertisement
3.2.60
Port0:122h-123h / Port1:N/A D_DescSize_H,L (Device Descriptor Size High, Low)
Base Address: Port0=000h, Port1=200h
Mode
Ofst Adrs
Device
122h-123h
D_DescSize_H,L
This specifies the descriptor size.
Bit15-10
Reserved
Bit9-0
DescSize[9:0]
Descriptor size specifies the total data quantity returned by the descriptor reply function. For
detailed information on the descriptor reply function, refer to the D_EP0Control register
ReplyDescriptor bit section.
The value specified for descriptor size can range from 0x000 to 0x3FF, regardless of FIFO size or
area settings. DescSize is updated by the amount of data transmitted each time an IN transaction is
completed for endpoint EP0 when returning the descriptor reply.
Since the FIFO area for the descriptor reply function is not explicitly assigned, avoid duplication
with the FIFO for other endpoints using D_DescAdrs_H,L and D_DescSize_H,L register
specifications. Ideally, this should be from the address (0x0030) after the CSW area has been
reserved to the first address of the area reserved in AREA0 to 5.
S2R72V18 Technical Manual (Rev.1.00)
Register Name
R/W
15:
14:
13:
12:
11:
10:
9: DescSize [9]
8: DescSize [8]
7: DescSize [7]
6: DescSize [6]
5: DescSize [5]
R/W
4: DescSize [4]
3: DescSize [3]
2: DescSize [2]
1: DescSize [1]
0: DescSize [0]
Bit Symbol
0:
0:
0:
0:
0:
0:
Descriptor Size
EPSON
3. Register Details
Description
1:
1:
1:
1:
1:
1:
Reset
0000h
317
Advertisement
Table of Contents
