XC68HC705JB3 Motorola, XC68HC705JB3 Datasheet - Page 70

• Manufacturer Part Number: XC68HC705JB3
• Description: MICROCONTROLLER
• Manufacturer: Motorola

GENERAL RELEASE SPECIFICATION
10.2
MOTOROLA
10-2
OVERVIEW
This section provides an overview of the Universal Serial Bus (USB) module in the
MC68HC05JB3. This USB module is designed to serve as a low-speed (LS) USB
device per the Universal Serial Bus Specification Rev 1.0. Three types of USB
data transfers are supported: control, interrupt, and bulk (transmit only).
Endpoint 0 functions as a receive/transmit control endpoint. Endpoints 1 and 2
can function as interrupt or bulk, but only in the transmit direction.
A block diagram of the USB module is shown Figure 10-1. The USB module
manages communications between the host and the USB function. The module is
partitioned into four functional blocks. These blocks consist of a 3.3 volt regulator,
a dual function transceiver, the USB control logic, and the endpoint registers. The
blocks are further detailed in Section 10.4.
CPU BUS
Figure 10-1. USB Block Diagram
USB REGISTERS
UNIVERSAL SERIAL BUS MODULE
November 5, 1998
VPOUT
VMOUT
RCV
VPIN
VMIN
REGULATOR
3.3V OUT
D+
D–
USB
Upstream
Port
MC68HC05JB3
REV 1