DM163010 Microchip Technology, DM163010 Datasheet - Page 22

• Manufacturer Part Number: DM163010
• Description: BOARD DEMO PICDEM USB
• Manufacturer: Microchip Technology

Specifications of DM163010

• Processor To Be Evaluated: PlC16C745/765
• Interface Type: USB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

PICDEM™ USB User’s Guide
DS41174A-page 18
2.2.4
Data Format
The data is sent via PS/2 one byte at a time, regardless of direction, host-to-
In the case of host-to-device communication, the STOP bit is immediately fol-
device, or vice versa. The data is as follows:
lowed by an ACK bit (low), which is sent by the device to the host. The bits
are read on the falling edge of the clock for device-to-host communication
and on the rising edge for host-to-device communication. In the IDLE state,
the clock and data lines are held high by the device. See Figure 2.2 and
Figure 2.3 for device-to-host and host-to-device communication, respectively.
Clock
Data
• First comes a START bit (always low), followed by a
• data byte (Least Significant bit to Most Significant bit), then by a
• parity bit (high for an even number of high bits in the data byte and low
• STOP bit (always high)
Clock
Data
for an odd number), then by a
Figure 2.2: Device-to-Host Communication
Figure 2.3: Host-to-Device Communication
(Data bit Read on Falling Edge of Clock)
(Data bit Read on Rising Edge of Clock)
©
2001 Microchip Technology Inc.