Register Configuration; Table 21.2 H-Udi Registers - Hitachi SH7751 Hardware Manual

*3 Ground fixed or connected to the same signal (or the same behavior) as
However, the following problem occurs in the ground fixed.
Minute current flows when
chip. The current value follows the regulations of the pull-up resistance of the port pin.
This current does not affect the operation of the chip; however, it consumes
unnecessary power.
The maximum frequency of TCK (TMS, TDI, TDO) is 20 MHz. Make the TCK or SH7751 Series
CPG setting so that the TCK frequency is lower than that of the SH7751 Series peripheral module
clock.
21.1.4

Register Configuration

Table 21.2 shows the H-UDI registers. Except for SDBPR and SDBSR, these registers are mapped
in the control register space and can be referenced by the CPU.

Table 21.2 H-UDI Registers

Abbre-
Name viation
Instruction SDIR
register
Data register SDDR/
H SDDRH
Data register SDDRL R/W H'FFF0000A H'1FF0000A 16
L
Bypass SDBPR —
register
Interrupt
SDINT
factor
register
Boundary
SDBSR —
scan
register
Notes: *1 Initialized when the
state.
*2 The value read from H-UDI is fixed (H'FFFFFFFD).
*3 1 can be written to the LSB using the H-UDI interrupt command.
Rev. 3.0, 04/02, page 780 of 1064



CPU Side
P4 Area 7
R/W Address Address
R H'FFF00000 H'1FF00000 16
R/W H'FFF00008 H'1FF00008 32/16
— —
R/W H'FFF00014 H'1FF00014 16
— —



pin goes low or when the TAP is in the Test-Logic-Reset
is fixed to the ground because it is pulled up in the
Access Initial
Size Value*
H'FFFF
Unde-
fined
Unde-
fined
— Unde-
fined
H'0000
— Unde-
fined


H-UDI Side
Access Initial
1
R/W Size Value*
R/W 32 H'FFFFFFFD
(Fixed
value*
— — —
— — —
R/W 1 —
3
W* 32 H'00000000
R/W — Undefined
.
1
2
)