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PDF ZPSD312R-B-90JI Data sheet ( Hoja de datos )

Número de pieza ZPSD312R-B-90JI
Descripción Low Cost Field Programmable Microcontroller Peripherals
Fabricantes STMicroelectronics 
Logotipo STMicroelectronics Logotipo



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PSD3XX ZPSD3XX ZPSD3XXV
PSD3XXR ZPSD3XXR ZPSD3XXRV
Low Cost Field Programmable Microcontroller Peripherals
FEATURES SUMMARY
s Single Supply Voltage:
– 5 V±10% for PSD3xx, ZPSD3xx, PSD3xxR,
ZPSD3xxR
– 2.7 to 5.5 V for ZPSD3xxV, ZPSD3xxRV
s Up to 1 Mbit of EPROM
s Up to 16 Kbit SRAM
s Input Latches
s Programmable I/O ports
s Page Logic
s Programmable Security
Figure 1. Packages
PLDCC44 (J)
CLDCC44 (L)
PQFP44 (M)
TQFP44 (U)
January 2002
1/3

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ZPSD312R-B-90JI pdf
PSD3XX Family
1.0
Introduction
(cont.)
2.
Notation
2
The PSD3XX I/O ports can be used for:
Standard I/O ports
Programmable chip select outputs
Address inputs
Demultiplexed address outputs
A data bus port for non-multiplexed MCU applications
A data bus “repeater” port that shares and arbitrates the local MCU data bus with
external devices.
Implementing your design has never been easier than with PSDsoft —ST’s software
development suite. Using PSDsoft, you can do the following:
Configure your PSD3XX to work with virtually any microcontroller
Specify what you want implemented in the programmable logic using a high-level
Hardware Description Language (HDL)
Simulate your design
Download your design to the part using a programmer.
For a complete product comparison, refer to Table 1.
PSD3XX references the standard version of the PSD3XX family, which are ideal for
general-purpose embedded control applications.
PSD3XXR SRAM-less version of the PSD3XX. If you don’t require the 16 Kb SRAM or
need a larger external SRAM, go with this part to save cost.
ZPSD3XX has improved technology that helps reduce current consumption using the Turbo
bit. Excellent if you require a 5 V version of the PSD3XX that uses less power.
ZPSD3XXR SRAM-less version of the ZPSD3XX.
ZPSD3XXV 2.7 V to 5.5 V operation, ideal for very low-power and low-voltage
applications.
ZPSD3XXRV SRAM-less version of the ZPSD3XXV.
Throughout this data sheet, references are made to the PSD3XX. In most cases, these
references also cover the entire family. Exceptions will be noted. References, such as
“3X1 only” cover all parts that have a 301 or 311 in the part number. Use the following table
to determine what references cover which product versions:
Reference
PSD3XX
PSD
PSD3XX only
Non-ZPSD
ZPSD only
ZPSD3XX
Non-V versions
V versions only
V suffix
ZPSD3XXV only
SRAM-less
Non-R
PSD3XX
X
X
X
X
X
PSD3XXR
X
X
X
X
ZPSD3XX
X
X
X
X
ZPSD3XXR ZPSD3XXV ZPSD3XXRV
XXX
XXX
X
XX
X

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ZPSD312R-B-90JI arduino
PSD3XX Family
Table 2.
PSD3XX Pin
Descriptions
8
Name Type
Description
BHE/
PSEN
When the data bus is 8 bits:
This pin is for 8031 or compatible MCUs that use PSEN to
separate program space from data space. In this case, PSEN is
used for reads from the EPROM. Note: if your MCU does not
I output a PSEN signal, pull up this pin to VCC.
When the data bus is 16 bits:
This pin is BHE. When low, D8-D15 are read from or written to.
Note: in programming mode, this pin is pulsed between VPP and 0 V.
WR/VPP
or
R/W/VPP
The following control signals can be connected to this port, based on
your MCU (and the way you configure the PSD in PSDsoft):
I 1. WR—active-low write pulse.
2. R/W—active-high read/active-low write input.
Note: in programming mode, this pin must be tied to VPP.
The following control signals can be connected to this port, based on
RD/E/DS
I
your MCU (and the way you configure the PSD in PSDsoft):
1. RD—active-low read input.
2. E—E clock input.
3. DS—active-low data strobe input (3X2/3X3 devices only)
A19/CSI
The following control signals can be connected to this port:
1. CSI—Active-low chip select input. If your MCU supports a chip
select output, and you want the PSD to save power when not
I selected, use this pin as a chip select input.
2. If you don’t wish to use the CSI feature, you may use this pin as
an additional input (logic or address) to the PAD. A19 can be
latched (with ALE/AS), or a transparent logic input.
Reset
PSD3XX/ZPSD3XX:
This pin is user-programmable and can be configured to reset on a
high- or low-level input. Reset must be applied for at least 100 ns.
I ZPSD3XXV:
This pin is not configurable, and the chip will only reset on an
active-low level input. Reset must be applied for at least 500 ns,
and no operations may take place for an additional 500 ns minimum.
(See Figure 8.)
ALE/AS
PA0
PA1
PA2
PA3
PA4
PA5
PA6
PA7
If you use an MCU that has a multiplexed bus:
Connect ALE or AS to this pin. The polarity of this pin is configurable.
The trailing edge of ALE/AS latches all multiplexed address inputs
(and BHE where applicable).
I If you use an MCU that does not have a multiplexed bus:
If your MCU uses ALE/AS, connect the signal to this pin.
Otherwise, use this pin for a generic logic input to the PAD.
(Non-3X1 devices only.)
These pins make up Port A. These port pins are configurable, and
can have the following functions: (see Figure 5A and 5B)
1. Track AD7-AD0. This feature repeats the MCU address and data
I/O bus on all Port A pins.
2. MCU I/O—in this mode, the direction of the pin is defined by its
direction bit, which resides in the direction register.
3. Latched address output.
4. CMOS or open-drain output.
5. If your MCU is non-multiplexed: data bus input—connect your
data bus (D0-7) to these pins. See Figure 3.
Legend: The Type column abbreviations are: I = input only; I/O = input/output; P = power.

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