Microchip HCS365 Handleiding

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 2001-2011 Microchip Technology Inc.PreliminaryDS41156E-page 1

HCS365

1.0PROGRAMMING THE HCS365

HCS365 devices are programmed using a serial

method that differs from previous K

EELOQ

®

encoders.

This Serial mode will still allow the HCS365 to be pro-

grammed while in the users system (ICSP™). This

allows for great design flexibility. This programming

specification applies to HCS365 devices in all pack-

ages.

1.1Hardware Requirements

The HCS365 requires one programmable power sup-

ply for V

DD (4.5V to 5.5V) and a VPPof 9V to 14V. Both

supplies should have a minimum resolution of 0.25V.

FIGURE 1-1:HCS365 DIAGRAM

TABLE 1-1:PROGRAMMING PIN DESCRIPTION

PDIP, SOIC,

HCS365

S0

S1

S2

S3

VDD

LED

OUTPUT

V

SS

1

2

3

4

8

7

6

5

Pin NameFunctionHCS365Pin TypePin Description

S0DATA1I/OData Input Output

S1CLOCK2IClock Input

LEDV

PP7P(*)Program mode select

VssVss5PGround

V

DDVDD8PPower supply

Legend: I = Input, O = Output, P = Power

Note:In the HCS365, the programming high voltage is internally generated. To activate the Programming mode,

high voltage needs to be applied to LED input. This is used as a level source, meaning that LED does not

draw any significant current.

HCS365 Programming Specifications

Product specificaties