PIC18F4550-I/PT Microchip Technology Inc., PIC18F4550-I/PT Datasheet - Page 170
PIC18F4550-I/PT
Manufacturer Part Number
PIC18F4550-I/PT
Description
44 PIN, 32 KB FLASH, 2048 RAM, FS-USB 2.0
Manufacturer
Microchip Technology Inc.
Datasheet
1.PIC18F4550-IPT.pdf
(430 pages)
Specifications of PIC18F4550-I/PT
A/d Inputs
13-Channel, 10-Bit
Comparators
2
Cpu Speed
12 MIPS
Eeprom Memory
256 Bytes
Input Output
34
Interface
I2C/SPI/UART/USART/USB
Memory Type
Flash
Number Of Bits
8
Package Type
44-pin TQFP
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
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18F4550-I/PT
Manufacturer:
MURATA
Quantity:
12 000
Company:
Part Number:
PIC18F4550-I/PT
Manufacturer:
Microchip Technology
Quantity:
36 332
Company:
Part Number:
PIC18F4550-I/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
Part Number:
PIC18F4550-I/PT
Manufacturer:
MICROCHIP/微芯
Quantity:
20 000
- Current page: 170 of 430
- Download datasheet (8Mb)
PIC18F2455/2550/4455/4550
17.2.3
The USB Status register reports the transaction status
within the SIE. When the SIE issues a USB transfer
complete interrupt, USTAT should be read to determine
the status of the transfer. USTAT contains the transfer
endpoint number, direction and Ping-Pong Buffer
Pointer value (if used).
The USTAT register is actually a read window into a
four-byte status FIFO, maintained by the SIE. It allows
the microcontroller to process one transfer while the
SIE processes additional endpoints (Figure 17-4).
When the SIE completes using a buffer for reading or
writing data, it updates the USTAT register. If another
USB transfer is performed before a transaction
complete interrupt is serviced, the SIE will store the
status of the next transfer into the status FIFO.
REGISTER 17-3:
DS39632C-page 168
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7
bit 6-3
bit 2
bit 1
bit 0
Note 1:
Note:
U-0
—
This bit is only valid for endpoints with available Even and Odd BD registers.
USB STATUS REGISTER (USTAT)
The data in the USB Status register is valid
only when the TRNIF interrupt flag is
asserted.
Unimplemented: Read as ‘0’
ENDP3:ENDP0: Encoded Number of Last Endpoint Activity bits
(represents the number of the BDT updated by the last USB transfer)
1111 = Endpoint 15
1110 = Endpoint 14
....
0001 = Endpoint 1
0000 = Endpoint 0
DIR: Last BD Direction Indicator bit
1 = The last transaction was an IN token
0 = The last transaction was an OUT or SETUP token
PPBI: Ping-Pong BD Pointer Indicator bit
1 = The last transaction was to the Odd BD bank
0 = The last transaction was to the Even BD bank
Unimplemented: Read as ‘0’
ENDP3
R-x
USTAT: USB STATUS REGISTER
W = Writable bit
‘1’ = Bit is set
ENDP2
R-x
ENDP1
R-x
Preliminary
(1)
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
ENDP0
Clearing the transfer complete flag bit, TRNIF, causes
the SIE to advance the FIFO. If the next data in the
FIFO holding register is valid, the SIE will immediately
reassert the interrupt. If no additional data is present,
TRNIF will remain clear; USTAT data will no longer be
reliable.
FIGURE 17-4:
R-x
Note:
4-byte FIFO
for USTAT
Data Bus
If an endpoint request is received while the
USTAT
automatically issue a NAK back to the
host.
DIR
R-x
USTAT from SIE
FIFO
USTAT FIFO
© 2006 Microchip Technology Inc.
x = Bit is unknown
is
PPBI
R-x
full,
(1)
Clearing TRNIF
Advances FIFO
the
SIE
U-0
—
bit 0
will
Related parts for PIC18F4550-I/PT
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
20-Pin USB Flash Microcontrollers
Manufacturer:
MICROCHIP [Microchip Technology]
Datasheet:
Part Number:
Description:
PIC18F With 128-segment LCD Driver And 12-bit ADC, 8KB Flash, 768B RAM, CCP, MSS
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
PIC18F With 128-segment LCD Driver And 12-bit ADC, 16KB Flash, 768B RAM, CCP, MS
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
PIC18F With 192-segment LCD Driver And 12-bit ADC, 8KB Flash, 768B RAM, CCP, MSS
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
PIC18F With 192-segment LCD Driver And 12-bit ADC, 16KB Flash, 768B RAM, CCP, MS
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
Microcontrollers (MCU) 48KB 3328 RAM 52 I/O
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
Microcontrollers (MCU) 64KB 3328 RAM 52 I/O
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
32kB Flash, 2kB RAM, 1kB EE, NanoWatt XLP, LCD 64 QFN 9x9x0.9mm T/R
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
32kB Flash, 2kB RAM, 1kB EE, NanoWatt XLP, LCD 64 TQFP 10x10x1mm T/R
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
128kB Flash, 4kB RAM, 1kB EE, 16MIPS, NanoWatt XLP, LCD, 5V 80 TQFP 12x12x1mm T/
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
32kB Flash, 2kB RAM, 1kB EE, NanoWatt XLP, LCD 64 QFN 9x9x0.9mm TUBE
Manufacturer:
Microchip Technology
Datasheet:
Part Number:
Description:
32kB Flash, 2kB RAM, 1kB EE, NanoWatt XLP, LCD 64 TQFP 10x10x1mm TRAY
Manufacturer:
Microchip Technology
Part Number:
Description:
128kB Flash, 4kB RAM, 1kB EE, 16MIPS, NanoWatt XLP, LCD, 5V 80 TQFP 12x12x1mm TR
Manufacturer:
Microchip Technology