SH7125 Datasheet, PDF (687/782 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer

Section 19 Power-Down Modes
19.3.6 Standby Control Register 6 (STBCR6)
STBCR6 is an 8-bit readable/writable register that specifies the state of the power-down modes.
Bit: 7
6
5
4
3
2
1
0
UBC
RST
HIZ
-
-
-
-
STBY
MD
-
Initial value: 0
0
0
0
0
0
0
0
R/W: R/W R/W R
R
R
R R/W R
Bit
7
6
5 to 2
1
0
Bit Name
UBCRST
Initial
Value
0
HIZ
0

All 0
STBYMD 0

0
R/W Description
R/W UBC Software Reset
Resetting the PC trace unit of UBC is controlled by
software.
Clearing this bit to 0 puts the PC trace unit of the UBC
module into the power-on reset state.
0: Puts the PC trace unit of UBC into the reset state
1: Releases reset in the PC trace unit of UBC
R/W Port High-Impedance
In software standby mode, this bit selects whether the
pin state is retained or changed to high-impedance.
0: In software standby mode, the pin state is retained
1: In software standby mode, the pin state is changed
to high-impedance
R Reserved
These bits are always read as 0. The write value should
always be 0.
R/W Software Standby Mode Select
If this bit is set to 1, executing SLEEP instruction with
the STBY bit in STBCR1 is 1 and makes transition to
software standby mode.
0: Setting prohibited
1: Makes transition to software standby mode
R Reserved
This bit is always read as 0. The write value should
always be 0.
Rev. 3.00 Sep. 27, 2007 Page 667 of 758
REJ09B0243-0300