Datasheet

Universal Serial Bus Module (USB)
Technical Data MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3
124 Universal Serial Bus Module (USB) Freescale Semiconductor
9.5 Functional Description
Figure 9-2 shows the block diagram of the USB module. The USB
module manages communications between the host and the USB
function. The module is partitioned into three functional blocks. These
blocks consist of a dual-function transceiver, the USB control logic, and
the endpoint registers. The blocks are further detailed later in this section
(see 9.7 Hardware Description).
Figure 9-2. USB Block Diagram
D +
D –
TRANSCEIVER
RCV
VPIN
VMIN
VPOUT
VMOUT
CPU BUS
USB REGISTERS
USB
UPSTREAM
PORT
USB
CONTROL
LOGIC