PIC18F-LF1XK50 Datasheet, PDF (254/420 Pages) Microchip Technology – 20-Pin USB Flash Microcontrollers

PIC18F/LF1XK50
REGISTER 22-2: UCFG: USB CONFIGURATION REGISTER
R/W-0
U-0
UTEYE
—
bit 7
U-0
R/W-0
U-0
—
UPUEN⁽¹⁾
—
R/W-0
FSEN⁽¹⁾
R/W-0
PPB1
R/W-0
PPB0
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7
bit 6-5
bit 4
bit 3
bit 2
bit 1-0
UTEYE: USB Eye Pattern Test Enable bit
1 = Eye pattern test enabled
0 = Eye pattern test disabled
Unimplemented: Read as ‘0’
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
Unimplemented: Read as ‘0’
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
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.
DS41350E-page 254
Preliminary
 2010 Microchip Technology Inc.