Maxim Integrated MAX32665 User Manual

MAX32665-MAX32668 User Guide
Maxim Integrated Page 420 of 457
USBHS IN Endpoint Upper Control
USBHS_INCSRU
[0x0013]
Bits
Name
Access
Reset
Description
6
iso
R/W
0
Isochronous Transfer Enable
0: Enable IN Bulk and IN Interrupt transfers
1: Enable IN Isochronous transfers
5
mode
R/W
0
Endpoint Direction Mode
0: Endpoint direction is OUT
1: Endpoint direction is IN
Note: Ignored if endpoint is not used for both IN and OUT transactions.
4
dmareqenab
R/W
0
DMA Request Enable
0: Disable DMA for this IN endpoint
1: Enable DMA for this IN endpoint
3
frcdatatog
R/W
0
Force IN Data-Toggle
0: Toggle data-toggle only when an ACK is received
1: Toggle data-toggle regardless of whether an ACK is received
Note: Useful for Interrupt IN endpoints that are communicating rate feedback to
Isochronous endpoints.
2
dmareqmode
R/W
0
DMA Request Mode Enable
0: Enable DMA Request Mode 0. A DMA request is generated for each packet
transmission. This mode can only be selected after the dmareqenab bit is
cleared first.
1: Enable DMA Request Mode 1. A DMA request is generated only when a packet
of size USBHS_INMAXP.maxpacketsize is received.
1
dpktbufdis
R/W
0
Double Packet Buffering Disable
0: Enable double packet buffering. Firmware must also configure the FIFO and
packet size.
1: Disable double packet buffering
0
-
R/W
0
Reserved for Future Use
Do not modify this field.
Table 21-22: USBHS OUT Endpoint Maximum Packet Size Register
USBHS OUT Endpoint Maximum Packet Size
USBHS_OUTMAXP
[0x0014]
Bits
Name
Access
Reset
Description
15:11
numpackminus1
R/W
0x00
Number of Split Packets
Defines the maximum number of packets minus 1 that a USB payload is combined
into. The value must be an exact multiple of maxpacketsize.
The total number of bytes transferred in the payload is maxpacketsize x
(numpackminus1+1). This must match the maxpacketsize field of the Standard
Endpoint Descriptor for the associated endpoint.
Only applicable for Hi-Speed (HS), High Bandwidth Isochronous endpoints, and Bulk
endpoints. Ignored in all other cases.
HS High Bandwidth Isochronous Endpoints
The multiplier can only be 2 or 3, so this bit field value can only be 0x01 or 0x02.
Bulk Endpoints
The max multiplier is 32, so the maximum value for this register is 31 (0x1F).

Maxim Integrated MAX32665 Specifications

General

Brand	Maxim Integrated
Model	MAX32665
Category	Motherboard
Language	English