Cypress STK11C68 - Manual (Page 2)

STK11C68
Document Number: 001-50638 Rev. ** Page 2 of 16
Pin Configurations
Figure 1. Pin Diagram - 28-Pin SOIC/DIP and 28-Pin LLC
Pin Definitions
Pin Name Alt IO Type Description
A
0
–A
12
Input Address Inputs. Used to select one of the 8,192 bytes of the nvSRAM.
DQ
0
-DQ
7
Input or
Output
Bidirectional Data IO Lines. Used as input or output lines depending on operation.
WE W
Input Write Enable Input, Active LOW. When the chip is enabled and WE is LOW, data on the
IO pins is written to the specific address location.
CE E
Input Chip Enable Input, Active LOW. When LOW, selects the chip. When HIGH, deselects the
chip.
OE G
Input Output Enable, Active LOW. The active LOW OE input enables the data output buffers
during read cycles. Deasserting OE HIGH causes the IO pins to tri-state.
V
SS
Ground Ground for the Device. The device is connected to ground of the system.
V
CC
Power Supply Power Supply Inputs to the Device.
1&
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'4
'4
9
66
9
&&
1&
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