Willem programmer software version 0.97ja or latest.
Programmer jumpers - W/Jp1 (2-wire cable to dc2dc_a4), Jp3 (+5V), Jp4 (Vpp)
2716, 27C16
Selected device EPROM > 27xxx > 2716, change default twp from 25 to 10ms
Adapter jumpers JpA, JpC;
dc2dc_a4 jumpers - JpS (Vcc from programmer, +5.0), JpT (Vpp=4.3V , read)
Adjust R5 - Vpp=25.8V (2716, 27C16), Vpp=21.5V (2716A, 27C16A)
Verified chips :
AM2716D, MBM2716, HN462716, Intel D2716, M5L2716K, MK2716J, MM2716Q, Nec D2716D, SGS M2716FI, ST Micro M2716FI, SAB2716D, ET2716QQ, TMM2716, K573РФ2, КС573РФ2, К573РФ5
2732, 27C32
Selected device EPROM > 27xxx > 2732, change default twp from 25 to 10ms
Adapter jumpers JpB, JpD;
dc2dc_a4 jumpers - JpS (Vcc from programmer, +5.0)
Adjust R5 - Vpp=25.8V (2732, 27C32), Vpp=21.5V (2732A, 27C32, 27C32A)
Verified chips :
MBM2732A, Intel TD2732A, M2732A, TMS2732A, NMC27C32Q
27C16B
Selected device EPROM > 27xxx > 27C16, twp=140mks
Adapter jumpers JpA, JpC;
dc2dc_a4 jumpers - JpR (Vcc from dc2dc), JpM , JpN (Vcc=6.2V or without JpN Vcc=5.8V) , JpP (Vpp=11..14V)
Adjust R5 - Vpp=12.9V
No verified chips .
2732B, 27C32B
Selected device EPROM > 27xxx > 27C32, twp =140mks
Adapter jumpers JpB, JpD;
dc2dc_a4 jumpers - JpR (Vcc from dc2dc), JpM , JpN (Vcc=6.2V or without JpN Vcc=5.8V) , JpP (Vpp=11..14V)
Adjust R5 - Vpp=12.9V
No verified chips .
Chip test results find in chip_test.xls file.
How to adjust Vpp ?
Install dc2dc_a4 and eprom adapter without target chip on ezoflash+.
Connect power supply, PC and run SW. Adjust Vpp on LM317- IN with R5
Programmer power supply schould provide 500mA current. Not recomended voltage more than +15V, regulator 7805 power dissipation is up to 4W and it will get more hot. More twp, more programming time and summary heat.
Practically all 2716 chips require +5V on Vpp during read , set jumper T, Vpp=4.3V.
Voltage convertor dc2dc cannot be used with dip24_a1.
Add diod in correct polarity between Vcc and Vpp on adapter when previous version voltage convertor dc2dc_a2 used.
Only erased EPROM can be programmed. Initially, and after each erasure, all bits of the EPROM are in the logic high state. Run SW command Blank check to assure all bytes are 0xFF. Logic lows are programmed into desired locations. Repeat programming (check voltage, increase twp) on logic low programming failure.
Programmed logic low can be erased only by ultraviolet light (UV lamp , wavelenght 2537 Angstroms, intensity 12mW/cm2, chip window 1..2cm from UV source, exposure time 12…20 minutes)
Note. Following chips cannot be programmed on this adapter.
TMS2716 – additionally -5V required, like for generic 2708.
TMS2532, HN462532, NTE2532, MCM2532- different pinout (pin18- A11, pin 21- Vpp)
Report problems and share your experience on Willem and EZoFlash forums.
