Algocraft WriteNow! (WN-PRG01A) is a single-site in-system programmer with a built-in relay barrier on its ISP lines. It programs microcontrollers, serial memories, CPLDs and other devices on the assembled board, through JTAG, SWD, SPI, I2C, UART and many other protocols, and fits inside a test fixture, under the control of an ATE or a PC, or standalone. Pertech is an Algocraft distributor.
WriteNow! highlights
- Single programming site with a built-in ISP relay barrier
- Serial numbers, MAC addresses and production codes programmed as variable data
- Microcontrollers, serial and parallel memories, CPLDs and other programmable devices
- JTAG, SWD, SPI/QSPI, I2C, UART, BDM, SWIM, ICSP, UPDI, SBW and many more protocols
- Programmable I/O voltage 1.6 to 5.5 V, high-speed I/O, EOS/ESD protection
- Isolated LAN, isolated RS-232, USB and an isolated low-level interface for ATE control
- Standalone operation from projects on the built-in memory card
- SDK/API for Visual C, Visual Basic, C# and LabVIEW, plus an ASCII command protocol
Where the WriteNow! fits
- In-circuit and functional test stations (Keysight, Teradyne, TRI, SPEA, SEICA)
- Single-board programming stations and fixtures
- Automotive production with PSI5 and differential-bus adapters
- Lines that need serial numbers, MAC addresses or calibration data per board
Key Specifications
| Spec | Value |
|---|---|
| Model | WN-PRG01A |
| Programming sites | 1 |
| Device types | Microcontrollers, CPLDs, serial memories, programmable ICs |
| Programming protocols | JTAG, SWD, UART, SPI/QSPI, BDM, SWIM, I2C, DAP, cJTAG, C2, ICSP, PDI, UPDI, FINE, MUST/MICE, MON08, ISSP, ICC, MDI, OUT, PSI5, SBW and custom |
| ISP lines | Adjustable voltage 1.6 to 5.5 V (100 mV steps); 6 bidirectional lines, 1 output line |
| Programmable power supply | 1 channel |
| Host interfaces | RS-232 (isolated), LAN 100 Mbit/s (isolated), USB full speed |
| Low-level interface (isolated) | START, OK/ERR, BUSY, PRJ_SEL[0..5] |
| Relay barrier | Built in |
| Demultiplexer module | Not available |
| Power supply | 15 to 24 V |
| Dimensions | 143 x 90 x 29 mm with enclosure |
| Package contents | WriteNow! unit, 15 V power supply, RS-232/USB/LAN cables, test board, 48-way female wire-wrap connector |
Frequently asked questions
What is the WriteNow! WN-PRG01A?
It is an Algocraft in-system programmer with one programming site and a built-in relay barrier, for programming devices on the assembled board in production.
What is the relay barrier for?
It switches the ISP connections between the programmer and the board through reed relays, so the programmer can be isolated from the board when it is not programming. On the multi-site models the relay barrier is an optional module.
How is it controlled on the production line?
Standalone with the START line, from a PC with the Algocraft software, or from an ATE through isolated LAN, RS-232 or the low-level interface, using the ASCII command protocol or the SDK for Visual C, Visual Basic, C# and LabVIEW.
Which WriteNow! model do I need?
Pick the number of sites to match the boards you program per cycle: WriteNow! (1 site, relay barrier built in), WriteNow! 2, 4 or 8. All models share the same software and projects, and the single-site µISP is compatible with them for lab work.
Where can I buy the WriteNow! WN-PRG01A in Israel?
Pertech is an Algocraft distributor in Israel. Contact Pertech for a quote, a check that your devices are supported, or help planning the programming station.
Related Algocraft products at Pertech
- WriteNow! 2 WN-PRG02A, 2 sites
- WriteNow! 4 WN-PRG04A, 4 sites
- WriteNow! 8 WN-PRG08A, 8 sites
- µISP single-site in-system programmer
- Write!Before socket gang programmer
- Algocraft programmers at Pertech
Planning a programming station? Contact Pertech for a quote, a demo or a device support check.







