PIC16C745/JW Microchip Technology, PIC16C745/JW Datasheet - Page 70

• Manufacturer Part Number: PIC16C745/JW
• Description: IC MCU EPROM8KX14 USB A/D 28CDIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C745/JW

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 24MHz
• Connectivity: SCI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 14KB (8K x 14)
• Program Memory Type: EPROM, UV
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4.35 V ~ 5.25 V
• Data Converters: A/D 5x8b
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 28-CDIP (0.300", 7.62mm) Window
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

PIC16C745/765
REGISTER 10-11: BUFFER DESCRIPTOR STATUS. BITS READ BY THE MCU
REGISTER 10-12: BUFFER DESCRIPTOR BYTE COUNT
DS41124C-page 70
Note:
bit7
bit 7:
bit 6:
bit 5-2: PID<3:0>: Packet Identifier
bit 1-0: Reserved: Read as 'X'
bit7
bit 7-4: Reserved: Read as ’X’
bit 3-0: BC<3:0>: The Byte Count bits represent the number of bytes that will be transmitted for an IN TOKEN or
UOWN
R/W-0
U-X
—
Recommend that users not use BSF, BCF due to the dual functionality of this register.
received during an OUT TOKEN. Valid byte counts are 0 - 8. The SIE will change this field upon the com-
pletion of an OUT or SETUP token with the actual byte count of the data received.
UOWN: USB Own
This UOWN bit determines who currently owns the buffer. The SIE writes a 0 to this bit when it has com-
pleted a token. This byte of the BD should always be the last byte the MCU updates when it initializes a
BD. Once the BD has been assigned to the USB, the MCU should not change it in any way.
1 = USB has exclusive access to the BD. The MCU should not modify the BD or buffer.
0 = The MCU has exclusive access to the BD. The USB ignores all other fields in the BD.
DATA0/1: This bit defines the type of data toggle packet that was transmitted or received
1 = Data 1 packet
0 = Data 0 packet
The received token PID value.
DATA0/1
R/W-X
U-X
—
(BDndST: 1A0h, 1A4h, 1A8h, 1ACh, 1B0h, 1B4h)
(BDndBC: 1A1h, 1A5h, 1A9h, 1ADh, 1B1h, 1B5h)
R/W-X
PID3
U-X
—
R/W-X
PID2
U-X
—
R/W-X
R/W-X
PID1
BC3
Preliminary
R/W-X
R/W-X
PID0
BC2
R/W-X
BC1
U-X
—
R/W-X
BC0
U-X
—
bit0
bit0
2000 Microchip Technology Inc.
R = Readable bit
W = Writable bit
U = Unimplemented bit,
-n = Value at POR reset
X = Don’t care
R = Readable bit
W = Writable bit
U = Unimplemented bit,
-n = Value at POR reset
X = Don’t care
read as ‘0’
read as ‘0’