Datasheet

 2015 Microchip Technology Inc. Preliminary DS60001320B-page 221

PIC32MZ Embedded Connectivity with Floating Point Unit (EF) Family

bit 15-11 MULT<4:0>: Multiplier Control bits

For Isochronous/Interrupt endpoints or of packet splitting on Bulk endpoints, multiplies TXMAXP by MULT+1

for the payload size.

For Bulk endpoints, MULT can be up to 32 and defines the number of “USB” packets of the specified payload

into which a single data packet placed in the FIFO should be split, prior to transfer. The data packet is required

to be an exact multiple of the payload specified by TXMAXP.

For Isochronous/Interrupts endpoints operating in Hi-Speed mode, MULT may be either 2 or 3 and specifies

the maximum number of such transactions that can take place in a single microframe.

bit 10-0 TXMAXP<10:0>: Maximum TX Payload per transaction Control bits

This field sets the maximum payload (in bytes) transmitted in a single transaction. The value is subject to the

constraints placed by the USB Specification on packet sizes for Bulk, Interrupt and Isochronous transfers in

Full-Speed and Hi-Speed operations.

TXMAXP must be set to an even number of bytes for proper interrupt generation in DMA Mode 1.

(ENDPOINT 1-7) (CONTINUED)