UG-2828GDEDF11 Datasheet, PDF (7/26 Pages) List of Unclassifed Manufacturers – Product Specification

WiseChip Semiconductor Inc.
Doc. No: SAS1-0D038-A
1.5 Pin Definition (Continued)
Pin Number Symbol I/O
Function
Interface (Continued)
15
E/RD#
16
R/W#
7~14
D7~D0
Reserve
1, 30
N.C. (GND)
6, 25, 29
N.C.
Read/Write Enable or Read
This pin is MCU interface input. When interfacing to a 68XX-series
microprocessor, this pin will be used as the Enable (E) signal. Read/write operation
I
is initiated when this pin is pulled high and the CS# is pulled low.
When connecting to an 80XX-microprocessor, this pin receives the Read (RD#)
signal. Data read operation is initiated when this pin is pulled low and CS# is
pulled low.
When serial mode is selected, this pin must be connected to VSS.
Read/Write Select or Write
This pin is MCU interface input. When interfacing to a 68XX-series
microprocessor, this pin will be used as Read/Write (R/W#) selection input. Pull
I
this pin to “High” for read mode and pull it to “Low” for write mode.
When 80XX interface mode is selected, this pin will be the Write (WR#) input.
Data write operation is initiated when this pin is pulled low and the CS# is pulled
low.
When serial mode is selected, this pin must be connected to VSS.
Host Data Input/Output Bus
These pins are 8-bit bi-directional data bus to be connected to the
I/O microprocessor’s data bus. When serial mode is selected, D1 will be the serial
data input SDIN and D0 will be the serial clock input SCLK.
Unused pins must be connected to VSS except for D2 in serial mode.
Reserved Pin (Supporting Pin)
- The supporting pins can reduce the influences from stresses on the function pins.
These pins must be connected to external ground as the ESD protection circuit.
Reserved Pin
- The N.C. pins between function pins are reserved for compatible and flexible
design.
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4D Systems Pty Ltd
4
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