HCSXXX Datasheet, PDF (22/28 Pages) Microchip Technology – Memory Programming Specification

HCSXXX
5.5 Programming Waveforms (HCS201)
FIGURE 5-3:
PROGRAMMING WAVEFORMS (HCS201)
S2
(Clock)
DATA
(Data)
Note:
Enter Program
Mode
TPBW TCLKH
TDS
Initiate Data
Polling Here
TCLKL
TPHOLD
TPS TPH1
TCLKL
TDH
TWC
TACKL TACKH
bit 0 bit 1 bit 2 bit 3 bit 14 bit 15
Ack
Ack
Ack
TPH2
Write Cycle
Complete Here
Repeat for each word (12 times)
Calibration Pulses
S0 and S1 button inputs to be held to ground during the entire programming sequence.
bit 16 bit 17
Data for Word 1
FIGURE 5-4:
VERIFY WAVEFORMS
End of Programming Cycle
DATA
(Data)
bit 190 bit 191
Ack
TWC
S2
(Clock)
Beginning of Verify Cycle
Data from Word 0
bit 0 bit 1 bit 2 bit 3
TDV
bit 14 bit 15 bit 16 bit 17
Note:
If a Verify operation is to be done, then it must immediately follow the Program cycle.
bit 190bit 191
DS41256A-page 22
Preliminary
 2004 Microchip Technology Inc.