SH7720 Datasheet, PDF (1033/1524 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

Section 29 PC Card Controller (PCC)
Bit
Bit Name Initial Value R/W Description
1
P0BW
0
R/W PCC0 Battery Warning
Indicates whether the BVD2 and BVD1 of the PC card are in
the state in which "the battery must be changed although the
data is guaranteed" when the PC card connected to area 6 is
on the IC memory card interface. When the BVD2 and BVD1
are 0 and 1, respectively, the P0BW bit is set to 1; in other
cases, the P0BW bit remains at 0. This bit is updated when the
BVD2 and BVD1 are changed. Write 0 to bit 1 in order to clear
this bit to 0. This bit is not changed if 1 is written. This bit
always reads 0 on the I/O card interface.
0: BVD2 and BVD1 of the PC card are not in the battery
warning state when the PC card is in the IC memory card
interface
1: BVD2 and BVD1 of the PC card are in the battery warning
state and "the battery must be changed although the data is
guaranteed" when the PC card is on the IC memory card
interface
0
P0BD
0
R/W PCC0 Battery Dead
Indicates whether the BVD2 and BVD1 of the PC card are in
the state in which "the battery must be changed since the data
is not guaranteed" when the PC card connected to area 6 is on
the IC memory card interface. When the BVD2 and BVD1 are
1 and 0 or 0 and 0, the P0BD bit is set to 1; in other cases, the
P0BD bit remains at 0. This bit is updated when the BVD2 and
BVD1 are changed. Write 0 to bit 0 in order to clear this bit to
0. This bit is not changed if 1 is written. This bit always reads 0
on the I/O card interface.
0: BVD2 and BVD1 of the PC card are not in the state in which
"the battery must be changed since the data is not
guaranteed" when the PC card is on the IC memory card
interface
1: BVD2 and BVD1 of the PC card are in the state in which
"the battery must be changed since the data is not
guaranteed" when the PC card is on the IC memory card
interface
Rev. 3.00 Jan. 18, 2008 Page 971 of 1458
REJ09B0033-0300