Datasheet

 2012 Microchip Technology Inc. Preliminary DS41639A-page 327
PIC16(L)F1454/5/9
REGISTER 26-2: UCFG: USB CONFIGURATION REGISTER
R/W-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
UTEYE
Reserved — UPUEN
(1)
Reserved FSEN
(1)
PPB<1:0>
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 7
UTEYE: USB Eye Pattern Test Enable bit
1 = Eye pattern test enabled
0 = Eye pattern test disabled
bit 5
Reserved: Read as ‘0’. Maintain this bit clear
bit 4
UPUEN: USB On-Chip Pull-up Enable bit
(1)
1 = On-chip pull-up enabled (pull-up on D+ with FSEN = 1 or D- with FSEN = 0)
0 = On-chip pull-up disabled
bit 3 Reserved: Read as ‘0’. Maintain this bit clear
bit 2
FSEN: Full-Speed Enable bit
(1)
1 = Full-speed device: controls transceiver edge rates; requires input clock at 48 MHz
0 = Low-speed device: controls transceiver edge rates; requires input clock at 6 MHz
bit 1-0
PPB<1:0>: Ping-Pong Buffers Configuration bits
11 = Even/Odd ping-pong buffers enabled for Endpoints 1 to 15
10 = Even/Odd ping-pong buffers enabled for all endpoints
01 = Even/Odd ping-pong buffer enabled for OUT Endpoint 0
00 = Even/Odd ping-pong buffers disabled
Note 1: The UPUEN, and FSEN bits should never be changed while the USB module is enabled. These values
must be preconfigured prior to enabling the module.