参数资料
型号: PSD502B1
英文描述: Field Programmable Microcontroller Peripherals(可编程逻辑,16K位SRAM,40个可编程I/O,通用PLD有61个输入)
中文描述: 现场可编程微控制器外围设备(可编程逻辑,16K的位的SRAM,40余个可编程输入/输出,通用PLD的有61个输入)
文件页数: 14/130页
文件大小: 704K
代理商: PSD502B1
PSD5XX Famly
6-14
ZPLDBlock
(Cont.)
Port A Macrocell Structure
Figure 5a shows the PA Macrocell block, which consists of 8 identical macrocells.
Each macrocell output can be connected to its own I/O pin on Port A. There are 3 user
programmable global product terms output from the GPLD’s AND ARRAY which are
shared by all the macrocells in Port A:
J
PA.OE
Enable or tri-state Port A output pins
J
PA.PR
Preset D flip flop in the macrocells
J
PA.RE
Reset/Clear D flip flop in the macrocells
Two other inputs, CLKIN and MACRO-RST, are used as clock and clear inputs to the D flip
flop. The CLKIN comes directly from the CLKIN input pin. The MACRO-RST is the same as
the Reset input pin except it is user configurable.
The circuit of a Port A Macrocell is shown in Figure 6. There are 6 product terms from the
GPLD’s AND ARRAY as inputs to the macrocell. Users can select the polarity of the output,
and configure the macrocell to operate as:
J
Registered Output
Select output from D flip flop
J
Combinatorial Output
Select output from OR gate
J
GPLD Input
Use Port A pin as dedicated input
J
GPLD Output
Use Port A pin as dedicated output
J
GPLD I/O
Use Port A pin as bidirectional pin
J
Macrocell Feedback
Register feedback for state machine implementations or expander feedback
from the combinatorial output, to expand the number of product terms available to
another macrocell.
In case of "Buried Feedback", where the output of the macrocell is not connected to a
Port A pin, Port A can be configured to perform other user defined I/O functions.
The two global product terms assigned for asynchronous clear (PA.RE) and preset (PA.PR)
are mainly for proper Port A Macrocell initialization. The macrocell flip-flop can also be
cleared during reset by MACRO-RST, if such an option is chosen. The clock source is
always the input clock CLKIN.
相关PDF资料
PDF描述
PSD503B1 Field Programmable Microcontroller Peripherals(可编程逻辑,16K位SRAM,40个可编程I/O,通用PLD有61个输入)
PSD502B1-12U 200V 100kRad Hi-Rel Single N-Channel TID Hardened MOSFET in a TO-204AE package; Similar to IRH7250 with optional Total Dose Rating of 1000kRads
PSD502B1-12UI 250V 100kRad Hi-Rel Single N-Channel SEE Hardened MOSFET in a TO-254AA package; A IRHM57264SE with Standard Packaging
PSD502B1-15J 600V 100kRad Hi-Rel Single N-Channel TID Hardened MOSFET in a TO-257AA package. Also available in Radiation Levels up to 300KRad.; Similar to IRHY67C30CM with Optional Total Dose Rating of 300kRads
PSD502B1-15JI 30V 100kRad Hi-Rel Single N-Channel TID Hardened MOSFET in a TO-257AA package; Similar to IRHY57Z30CM with optional Total Dose Rating of 300kRads
相关代理商/技术参数
参数描述
PSD502B1-12J 制造商:未知厂家 制造商全称:未知厂家 功能描述:Field-Programmable Peripheral
PSD502B1-12JI 制造商:未知厂家 制造商全称:未知厂家 功能描述:Field-Programmable Peripheral
PSD502B1-12LI 制造商:未知厂家 制造商全称:未知厂家 功能描述:Field-Programmable Peripheral
PSD502B1-12U 制造商:未知厂家 制造商全称:未知厂家 功能描述:Field-Programmable Peripheral
PSD502B1-12UI 制造商:未知厂家 制造商全称:未知厂家 功能描述:Field-Programmable Peripheral