648
Table 22.2
H-UDI Commands
Bit 15 to 12
TI3
TI2
TI1
TI0
Description
0
0
0
0
EXTEST
0
1
0
0
SAMPLE/PRELOAD
0
1
0
1
Reserved
0
1
1
0
H-UDI reset negate
0
1
1
1
H-UDI reset assert
1
0
0
—
Reserved
1
0
1
—
H-UDI interrupt
1
1
0
—
Reserved
1
1
1
0
Reserved
1
1
1
1
Bypass mode
(Initial value)
0
0
0
1
Recovery from sleep
Bits 11 to 0—Reserved: These bits are always read as 1.
22.3.3
Boundary Scan Register (SDBSR)
The boundary scan register (SDBSR) is a shift register, located on the PAD, for controlling the
input/output pins of the SH7709S.
Using the EXTEST and SAMPLE/PRELOAD commands, a boundary scan test conforming to the
JTAG standard can be carried out. Table 22.3 shows the correspondence between the pins of this
LSI and boundary scan register bits.
Summary of Contents for SH7709S
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