Cypress STK16C88 User Manual download pdf (Page 2)

STK16C88

Document Number: 001-50595 Rev. ** Page 2 of 14

Pin Configurations

Figure 1. Pin Diagram - 28-Pin PDIP

Table 1. Pin Definitions - 28-Pin PDIP

Pin Name Alt IO Type Description

–A

Input Address Inputs. Used to select one of the 32,768 bytes of the nvSRAM.

-DQ

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.

Input Chip Enable Input, Active LOW. When LOW, selects the chip. When HIGH, deselects the

chip.

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.

Ground Ground for the Device. The device is connected to ground of the system.

Power Supply Power Supply Inputs to the Device.

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