Datasheet

Table Of Contents
Section 14 Boundary Scan Function
REJ09B0140-0900 Rev. 9.00 Page 477 of 846
Sep 16, 2010
H8S/2215 Group
14.3.4 Boundary Scan Register (BSCANR)
BSCAN is a 217-bit shift register assigned on the pins to control input/output pins.
The I/O pins consists of three bits (IN, Control, OUT), input pins 1 bit (IN), and output pins 1 bit
(OUT) of shift registers. The boundary scan test based on the JTAG standard can be performed by
using instructions listed in table 14.2. Table 14.4 shows the correspondence between the LSI pins
and boundary scan registers. (In table 14.4, Control indicates the high active pin. By specifying
Control to high, the pin is driven by OUT.) Figure 14.2 shows the boundary scan register
configuration example.
I/O pin
Control
OUT
IN
TDI pin
TDO pin
Figure 14.2 Boundary Scan Register Configuration