参数资料
型号: STPCI2EEYC
厂商: STMICROELECTRONICS
元件分类: 外设及接口
英文描述: MULTIFUNCTION PERIPHERAL, PBGA516
封装: PLASTIC, BGA-516
文件页数: 78/80页
文件大小: 854K
代理商: STPCI2EEYC
GENERAL DESCRIPTION
Issue 0.4 - July 16, 2001
8/80
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
ports speeds of up to 12 MB/s. USB is royalty free
and is likely to replace low-speed legacy serial,
parallel, keyboard, mouse and floppy drive inter-
faces. USB Revision 1.1 is fully supported under
Microsoft Windows 98 and Windows 2000.
The General Purpose Input/Output (GPIO)
interface provides a 16-bit I/O facility, using 16
dedicated device pins. It is organised using two
blocks of 8-bit Registers, one for lines 0 to 7, the
other for lines 8 to 15.
Each GPIO port can be configured as an input or
an output simply by programming the associated
port direction control register. All GPIO ports are
configured as inputs at reset, which also latches
the input levels into the Strap Registers. The input
states of the ports are thus recorded automati-
cally at reset, and this can be used as a strap
register anywhere in the system.
JTAG stands for Joint Test Action Group and is
the popular name for IEEE Std. 1149.1, Standard
Test Access Port and Boundary-Scan Architec-
ture. This built-in circuitry is used to assist in the
test, maintenance and support of functional circuit
blocks. The circuitry includes a standard interface
through which instructions and test data are
communicated. A set of test features is defined,
including a boundary-scan register so that a
component is able to respond to a minimum set of
test instructions.
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