PIC18F2550-I/SP Microchip Technology Inc., PIC18F2550-I/SP Datasheet - Page 175

• Manufacturer Part Number: PIC18F2550-I/SP
• Description: Microcontroller; 32 KB Flash; 2048 RAM; 256 EEPROM; 24 I/O; 28-Pin-SPDIP
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F2550-I/SP

• A/d Inputs: 10-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 12 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 23
• Interface: I2C/SPI/USART/USB
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 28-pin SPDIP
• Programmable Memory: 32K Bytes
• Ram Size: 2K Bytes
• Speed: 48 MHz
• Timers: 1-8-bit, 3-16-bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

REGISTER 17-5:
© 2006 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1-0
Note 1:
UOWN
R/W-x
2:
(1)
This bit must be initialized by the user to the desired value prior to enabling the USB module.
This bit is ignored unless DTSEN = 1.
UOWN: USB Own bit
0 = The microcontroller core owns the BD and its corresponding buffer
DTS: Data Toggle Synchronization bit
1 = Data 1 packet
0 = Data 0 packet
KEN: BD Keep Enable bit
1 = USB will keep the BD indefinitely once UOWN is set (required for SPP endpoint configuration)
0 = USB will hand back the BD once a token has been processed
INCDIS: Address Increment Disable bit
1 = Address increment disabled (required for SPP endpoint configuration)
0 = Address increment enabled
DTSEN: Data Toggle Synchronization Enable bit
1 = Data toggle synchronization is enabled; data packets with incorrect Sync value will be ignored
0 = No data toggle synchronization is performed
BSTALL: Buffer Stall Enable bit
1 = Buffer stall enabled; STALL handshake issued if a token is received that would use the BD in the
0 = Buffer stall disabled
BC9:BC8: Byte Count 9 and 8 bits
The byte count bits represent the number of bytes that will be transmitted for an IN token or received
during an OUT token. Together with BC<7:0>, the valid byte counts are 0-1023.
DTS
R/W-x
except for a SETUP transaction, which is accepted even if the data toggle bits do not match
given location (UOWN bit remains set, BD value is unchanged)
BDnSTAT: BUFFER DESCRIPTOR n STATUS REGISTER (BD0STAT THROUGH
BD63STAT), CPU MODE (DATA IS WRITTEN TO THE SIDE)
(2)
W = Writable bit
‘1’ = Bit is set
R/W-x
KEN
(1)
PIC18F2455/2550/4455/4550
INCDIS
R/W-x
Preliminary
(2)
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
DTSEN
R/W-x
BSTALL
R/W-x
x = Bit is unknown
R/W-x
BC9
DS39632C-page 173
R/W-x
BC8
bit 0