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| 型號(hào)： | QSMRM |
| 英文描述： | QSMRM QSM Queued Serial Module Reference Manual |
| 中文描述： | QSMRM QSM排隊(duì)串行模塊參考手冊(cè) |
| 文件頁數(shù)： | 11/112頁 |
| 文件大小： | 1496K |
| 代理商： | QSMRM |
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QSM
REFERENCE MANUAL
FUNCTIONAL OVERVIEW
MOTOROLA
1-1
SECTION 1
FUNCTIONAL OVERVIEW
The queued serial module (QSM) provides the microcontroller unit (MCU) with two se-
rial communication interfaces divided into two submodules: the queued serial periph-
eral interface (QSPI) and the serial communications interface (SCI).
The QSPI is a full-duplex, synchronous serial interface for communicating with periph-
erals and other MCUs. It is enhanced by the addition of a queue for receive and trans-
mit data.
The SCI is a full-duplex universal asynchronous receiver transmitter (UART) serial in-
terface. These submodules operate independently.
This section provides a block diagram, memory map, pin description, and register de-
scriptions of the QSM, with a breakdown of both the QSPI and SCI submodules. Op-
eration of the QSPI submodule includes master mode and slave mode. For a detailed
description refer to
4.4.1 Master Mode
and
4.4.2 Slave Mode
.
In addition, operation of the SCI submodule is divided into transmit and receive. A de-
scription of these operations is given in
5.3 Transmitter Operation
and
5.4 Receiver
Operation
.
To aid in grasping an understanding of the numerous bits and fields of the
registers that appear throughout the text, a quick reference guide identifies all bit/field
acronyms. (Refer to
Table 3-2
.)
1.1 Block Diagram
Figure 1-1
depicts the major components of the QSM, which consist of the global reg-
isters, logic control, and the QSPI and SCI submodules. Refer to
SECTION 4 QSPI
SUBMODULE
and
SECTION 5 SCI SUBMODULE
for further definition of these com-
ponents.
F
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
n
.
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