The Cypress Semiconductor ISR Programming Cable enables in-system reprogramming of Cypress CPLD devices without board removal. This JTAG-based accessory connects a host PC to target boards via a standard 10-pin male connector, supporting both parallel port and USB interfaces. It accommodates multiple CPLD families and file formats including JEDEC, Jam, STAPL, SVF, and Hex, while enabling daisy-chain programming of multiple devices in series.
## Technical Specifications
**Supported Devices**
• Cypress FLASH370i™ CPLDs
• Cypress Ultra37000™ CPLDs
• Cypress Ultra37000V™ CPLDs
• Cypress Delta39K™ CPLDs
• Cypress PSI™ CPLDs
**Programming Interface**
• Standard JTAG (Joint Test Action Group)
**File Format Support**
• JEDEC files (FLASH370i devices)
• Jam files (Ultra37000 devices)
• STAPL files (Chain Dependent and Chain Independent)
• SVF (Serial Vector Format) files
• Hex files
**PC Connection Options**
• Parallel port interface (C3ISR cable)
• USB 1.1 or USB 2.0 (USBISR cable)
**Target Board Interface**
• 10-pin male connector, 0.1-inch pin spacing
• Pin 1: ISRVPP / JTAGen (12V for FLASH370i programming)
• Pin 2: SDI / TDI
• Pin 3: SDO / TDO
• Pins 4–8: TMS/SMODE, TCK/SCLK, VCC, GND, NC
**Power Requirements**
• VCC pin accepts +5V from target system for buffer and DC/DC converter operation
• ISR C3ISR cable generates 12V on JTAGen pin for FLASH370i devices
• Ultra37000V devices may require 5V supply if not present on board
## Key Features
• Daisy-chain capability for multi-device programming
• Internal DC/DC converter generates 12V programming voltage from 5V supply
• Supports both legacy parallel and modern USB connectivity
• Standard JTAG interface ensures broad compatibility
## Typical Applications
Firmware updates and in-circuit debugging of CPLD-based embedded systems without device removal.
## Compatibility & Integration
Integrates with Cypress FLASH370i and Ultra37000 family CPLDs through standard JTAG daisy-chain architecture.
