6.2 Send Command (SendCommand) Pseudo Operation

Format:
SendCommand (command)
Purpose:
  • To send a command to select a specific TAP register.
Description (in sequence):

  1. The TMS Header is clocked into the device to select the Shift IR state

  2. The command is clocked into the device on TDI while holding signal TMS low.
  3. The last MSb of the command is clocked in while setting TMS high.
  4. The TMS Footer is clocked in on TMS to return the TAP controller to the Run/Test Idle state.
Restrictions:
  • None.
Example:
  • The following is an example of how to use the Send Command (SendCommand) function:
    SendCommand (5’h0x07)
Figure 6-3. Send Command (SendCommand) Four-Wire
Figure 6-4. Send Command (SendCommand) Two-Wire (4-phase)