HD64F2168 Datasheet, PDF (760/874 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

SDIDR serial data input/output
SDIDR is captured into the shift register in Capture-DR in IDCODE mode, and bits 0
to 31 of SDIDR are output in that order from the ETDO pin in Shift-DR.
Data input from the ETDI pin is not written to any register in Update-DR.
ETDI
Bit 31
Bit 31
.
.
.
SDIDR
.
Bit 0
Bit 0
ETDO
Capture-DR
Figure 21.5 Serial Data Input/Output (2)
Rev. 3.00, 03/04, page 720 of 830