HCSXXX

DS41256A-page 22

Preliminary

 2004 Microchip Technology Inc.

5.5

Programming Waveforms (HCS201)

FIGURE 5-3:

PROGRAMMING WAVEFORMS (HCS201)

FIGURE 5-4:

VERIFY WAVEFORMS

DATA

Enter Program

Mode

(Data)

(Clock)

bit 0 bit 1 bit 2 bit 3

bit 14 bit 15

bit 16 bit 17

Repeat for each word (12 times)

S2

Data for Word 1

Initiate Data

Polling Here

Write Cycle

Complete Here

Calibration Pulses

Ack

Ack

Ack

Note:

S0 and S1 button inputs to be held to ground during the entire programming sequence.

DATA

(Clock)

(Data)

End of Programming Cycle

Beginning of Verify Cycle

bit 1 bit 2 bit 3

bit 15

bit 14

bit 16 bit 17

bit 190bit 191

Data from Word 0

S2

bit 0

bit 191

bit 190

Ack

Note:

If a Verify operation is to be done, then it must immediately follow the Program cycle.