SH7205 Datasheet, PDF (1631/1904 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7200 Series

Section 31 User Debugging Interface (H-UDI)
(3) EXTEST
The EXTEST instruction tests the external circuit when this LSI is mounted on the printed circuit
board. During execution of this instruction, the output pin is used to output the test data (set in
advance by the SAMPLE/PRELOAD instruction) from the boundary scan register to the printed
circuit board and the input pin is used to capture the test result from the printed circuit board to the
boundary scan register. When a test is performed using the EXTEST instruction N times, the N-th
test data is scanned-in during (N-1)-th scan-out.
The data loaded in the boundary scan register of the output pin in the capture-DR state of this
instruction is not used in testing of the external circuit (an exchange is made in shift operation).
(4) IDCODE
To set the H-UDI pin to IDCODE mode defined by JTAG, set the command in SDIR from the H-
UDI pin. When H-UDI is initialized (TRST is asserted or TAP is placed in the test-logic-reset
state), IDCODE mode is entered.
(5) CLAMP and HIGHZ
To set the H-UDI pin to CLAMP or HIGHZ mode defined by JTAG, set the command in SDIR
from the H-UDI pin.
31.6.2 Notes
1. The clock related signals (EXTAL, XTAL, CKIO, AUDIO_X1, AUDIO_X2, USB_X1,
USB_X2, RTC_X1, and RTC_X2) are inapplicable to the boundary scan.
2. The reset-related signal (RES) is inapplicable to the boundary scan.
3. The H-UDI related signals (TCK, TDI, TDO, TMS, TRST, and ASEMD) are inapplicable to
the boundary scan.
4. The USB related signals (DP0, DM0, DP1, DM1, VBUS, and REFRIN) are inapplicable to the
boundary scan.
5. 2DG VIDEO OUT related signals (R, G, B, REXT, CBU) are inapplicable to the boundary
scan.
6. Execute the boundary scan in product chip mode and input the ASEMD pin to high during the
RES pin assertion period. And make sure to fix the ASEMD pin at high while executing the
boundary scan.
Rev. 1.00 Mar. 25, 2008 Page 1599 of 1868
REJ09B0372-0100