 2004 Microchip Technology Inc.

Preliminary

DS41256A-page 23

HCSXXX

5.6

Programming Waveforms (HCS360, HCS361)

FIGURE 5-5:

PROGRAMMING WAVEFORMS

FIGURE 5-6:

VERIFY WAVEFORMS

DATA

Enter Program

Mode

(Data)

(Clock)

bit 1 bit 2 bit 3

bit 14 bit 15

bit 16 bit 17

Repeat for each word

S2/S3

Data for Word 0 (KEY_0)

Data for Word 1

bit 0 bit 1 bit 2 bit 3

bit 14 bit 15

S1

bit 0

bit 0 of Word 0

Note

1:

Unused button inputs to be held to ground during the entire programming sequence.

2:

Acknowledge Pulse

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 190 bit 191

Data from Word0

S2/S3

bit 0

bit 191

bit 190

S1

Ack

Note

1:

A Verify sequence is performed only once immediately after the Program cycle.