PIC18F44J50-I/SPSQTP データシートの表示（PDF） - Microchip Technology

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PIC18F44J50-I/SPSQTP

28/44-Pin, Low-Power, High-Performance USB Microcontrollers with nanoWatt XLP Technology

Microchip Technology 

PIC18F46J50 FAMILY

REGISTER 22-1: UCON: USB CONTROL REGISTER (ACCESS F65h)

U-0

—

bit 7

R/W-0

R-x

R/C-0

R/W-0

R/W-0

PPBRST

SE0

PKTDIS USBEN(1) RESUME

R/W-0

SUSPND

U-0

—

bit 0

Legend:

R = Readable bit

-n = Value at POR

C = Clearable bit

W = Writable bit

‘1’ = Bit is set

U = Unimplemented bit, read as ‘0’

‘0’ = Bit is cleared

x = Bit is unknown

bit 7

Unimplemented: Read as ‘0’

bit 6

PPBRST: Ping-Pong Buffers Reset bit

1 = Reset all Ping-Pong Buffer Pointers to the Even Buffer Descriptor (BD) banks

0 = Ping-Pong Buffer Pointers are not being reset

bit 5

SE0: Live Single-Ended Zero Flag bit

1 = Single-ended zero is active on the USB bus

0 = No single-ended zero is detected

bit 4

PKTDIS: Packet Transfer Disable bit

1 = SIE token and packet processing are disabled, automatically set when a SETUP token is received

0 = SIE token and packet processing are enabled

bit 3

USBEN: USB Module Enable bit(1)

1 = USB module and supporting circuitry are enabled (device attached)

0 = USB module and supporting circuitry are disabled (device detached)

bit 2

RESUME: Resume Signaling Enable bit

1 = Resume signaling is activated

0 = Resume signaling is disabled

bit 1

SUSPND: Suspend USB bit

1 = USB module and supporting circuitry are in Power Conserve mode, SIE clock is inactive

0 = USB module and supporting circuitry are in normal operation, SIE is clocked at the configured rate

bit 0

Unimplemented: Read as ‘0’

Note 1: Make sure the USB clock source is correctly configured before setting this bit.

 2011 Microchip Technology Inc.

DS39931D-page 359

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