XC68HC08KH12 Motorola, XC68HC08KH12 Datasheet - Page 115
XC68HC08KH12
Manufacturer Part Number
XC68HC08KH12
Description
MICROCONTROLLER
Manufacturer
Motorola
Datasheet
1.XC68HC08KH12.pdf
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9.3 Overview
MC68HC(7)08KH12
MOTOROLA
—
Rev. 1.0
Features of the embedded device function include the following:
This section provides an overview of the Universal Serial Bus (USB)
module developed for the MC68HC(7)08KH12. This USB module is
designed to serve as a compound device, and operates from a reference
frequency of 48MHz, derived from the CGM
Generator Module
combined with a hub in a single USB module. For the hub sub-module,
five basic properties can be supported by the hardware or the software:
connectivity behavior, power management, device connect/disconnect
detection, bus fault detection and recovery, and full/low speed device
traffic control. Endpoint 0 of the hub sub-module functions as a
receive/transmit control endpoint. Endpoint 1 of the hub sub-module
functions as interrupt transfer to report the device change state. For the
embedded device sub-module, three types of USB data transfers are
supported: control, interrupt, and bulk (transmit only). Endpoint 0 of the
embedded device sub-module functions as a receive/transmit control
endpoint. Endpoints 1 and 2 of the embedded device sub-module can
function as interrupt or bulk, but only in the transmit direction.
A block diagram of the USB module is shown
module manages communications between the host and the USB
function. The module is partitioned into eight functional blocks. These
blocks consist of a 3.3 volt regulator, a dual function transceiver, the hub
repeater function, the SIE (Serial Interface Engine), the frame counter
logic, the hub control logic, the embedded device control logic, and the
endpoint registers.
•
•
•
Device Control Endpoint 0 and Interrupt Endpoints 1 and 2
– 8-byte transmit buffer
– 8-byte receive buffer
Device Interrupt Endpoints 1 and 2
– 8-byte transmit buffer
USB generated interrupts
– transaction interrupt driven
Universal Serial Bus Module (USB)
(CGM)). An embedded full speed device function is
Universal Serial Bus Module (USB)
(see Section 8. Clock
Figure
9-1. The USB
Advance Information
Overview
115
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