37LV36_04 Datasheet, PDF (8/14 Pages) Microchip Technology – 36K, 64K, and 128K Serial EPROM Family

37LV36/65/128
FIGURE 11-3: ENTER AND EXIT PROGRAMMING MODES
Enter Mode
Exit Mode
VCC
VPP
VPP2
CLK
VCCP
VPP1
TRPP
TSVC
TFPP
THVC
TSVC
DATA
CE
RESET/OE
TSVCE
TSVOE
FIGURE 11-4: PROGRAMMING CYCLE OVERVIEW (NO VERIFY UNTIL ENTIRE ARRAY IS
PROGRAMMED)
VCC
VPP
CLK
CE
VCC = VCCP
VPP1
VPP = VPP2
Enter
500 µs
Programming Programming
Mode
Mode
500 µs
Programming
Mode
500 µs
Programming
Mode
500 µs
Programming
Mode
2 CLKS
**Load
Word 1
CE low to clear
data latches
**Load
Word 2
**Load
Word 3
**Load
Word 4
**Load
Word 5
Clock Increments
Address Counter
RESET/OE
CEO
High if RESET/OE configured
*
*
*
*
*
** 32 Clocks
Low if RESET/OE configured
*Note: The CEO pin is high impedance when VPP = VPP1
FIGURE 11-5: DETAILS OF PROGRAM CYCLE
DS21109F-page 8
 2004 Microchip Technology Inc.