 2004 Microchip Technology Inc.

Preliminary

DS41256A-page 21

HCSXXX

5.4

Programming Waveforms (HCS200, HCS300, HCS301, HCS320, HCS362)

FIGURE 5-1:

PROGRAMMING WAVEFORMS

FIGURE 5-2:

VERIFY WAVEFORMS

PWM

Enter Program

Mode

(Data)

(Clock)

Note 1: Unused button inputs to be held to ground during the entire programming sequence.

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 0 (KEY_0)

Data for Word 1 (KEY_1)

Ack

Pulse

PWM

(Clock)

(Data)

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

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 Word 0

S2 (S3)

bit 0

bit 191

bit 190