Mitsubishi Electric M32R Series User Manual page 775

Mitsubishi 32-bit risc single-chip microcomputers

Table of Contents

you want to inspect or set.

you want to inspect or set.

Note 1 : The setup value for each register must be entered from the JTDI pin beginning with the LSB.

Note 2 : The value of each register is output from the JTDO pin beginning with the LSB. The JTDO pin

outputs valid data in only "Shift-IR" state of IR path sequence and "Shift-DR" state of DR path

sequence. In all other states, the JTDO pin is tristated (high impedance).

Note 3 : Data can only be read out from the data register which is selected by the instruction that was set

in the immediately preceding IR path sequence. Output in the selected data register's shift

Figure 19.4.5 Continuous JTAG Access

Specify the data register

(1) Basic access

Specify the data register

(2) Continuous access to the same data register

Setup data is entered serially from JTDI.

Reference data is serially output from JTDO.

Same data register can be operated

on to inspect or set data continuously.

19.4 Basic Operation of JTAG