Cyclone® V Device Handbook: Volume 1: Device Interfaces and Integration

ID 683375
Date 10/18/2023
Document Table of Contents

9.6.1. Boundary-Scan Cells of a Cyclone® V Device I/O Pin

The Cyclone® V device 3-bit BSC consists of the following registers:

  • Capture registers—Connect to internal device data through the OUTJ, OEJ, and PIN_IN signals.
  • Update registers—Connect to external data through the PIN_OUT and PIN_OE signals.

The TAP controller generates the global control signals for the IEEE Std. 1149.1 BST registers (shift, clock, and update) internally. A decode of the instruction register generates the MODE signal.

The data signal path for the boundary-scan register runs from the serial data in (SDI) signal to the serial data out (SDO) signal. The scan register begins at the TDI pin and ends at the TDO pin of the device.

Figure 179. User I/O BSC with IEEE Std. 1149.1 BST Circuitry for Cyclone® V Devices

Note: TDI, TDO, TMS, and TCK pins, all VCC and GND pin types, and VREF pins do not have BSCs.
Table 116.   Boundary-Scan Cell Descriptions for Cyclone® V DevicesThis table lists the capture and update register capabilities of all BSCs within Cyclone® V devices.
Pin Type Captures Drives Comments
Output Capture Register OE Capture Register Input Capture Register Output Update Register OE Update Register Input Update Register
Dedicated clock input 0 1 PIN_IN No Connect (N.C.) N.C. N.C. PIN_IN drives to the clock network or logic array
Dedicated input 28 0 1 PIN_IN N.C. N.C. N.C. PIN_IN drives to the control logic
Dedicated bidirectional (open drain)29 0 OEJ PIN_IN N.C. N.C. N.C. PIN_IN drives to the configuration control
Dedicated bidirectional30 OUTJ OEJ PIN_IN N.C. N.C. N.C. PIN_IN drives to the configuration control and OUTJ drives to the output buffer
Dedicated output31 OUTJ 0 0 N.C. N.C. N.C. OUTJ drives to the output buffer
28 This includes the PLL_ENA, VCCSEL, PORSEL, nIO_PULLUP, nCONFIG, MSEL0, MSEL1, MSEL2, MSEL3, MSEL4, and nCE pins.
29 This includes the CONF_DONE and nSTATUS pins.
30 This includes the DCLK pin.
31 This includes the nCEO pin.