R×5C348A/B
2.2 Control Register 2 (at Address Fh)
D7
VDSL
VDSL
0
D6
D5
D4
D3
D2
D1
WAFG
WAFG
0
D0
DAFG
DAFG
0
VDET SCRATCH1 XSTP CLEN1*2 CTFG
VDET SCRATCH1 XSTP CLEN1*2 CTFG
(For write operation)
(For read operation)
Default setting*1
0
0
1
0
0
1) Default settings: Default value means read/written values when the XSTP bit is set to “1” due to power-on from 0 volts or supply voltage drop.
*
*
2) This bit name applies to the R×5C348A only. For the R×5C348B the bit name is Scratch2.
2.2-1 VDSL
Supply Voltage Monitoring Threshold Selection Bit
VDSL
Description
0
1
Selecting the supply voltage monitoring threshold setting of 2.1 volts.
Selecting the supply voltage monitoring threshold setting of 1.6 volts.
(Default setting)
The VDSL bit is intended to select the supply voltage monitoring threshold settings.
2.2-2 VDET
Supply Voltage Monitoring Result Indication Bit
VDET
Description
(Default setting)
0
1
Indicating supply voltage above the supply voltage monitoring threshold settings.
Indicating supply voltage below the supply voltage monitoring threshold settings.
Once the VDET bit is set to 1, the supply voltage monitoring circuit will be disabled while the VDET bit will hold the
setting of 1. The VDET bit accepts only the writing of 0, which restarts the supply voltage monitoring circuit.
Conversely, setting the VDET bit to 1 causes no event.
2.2-3 SCRATCH1
Scratch Bit 1
SCRATCH1
Description
0
1
(default settings)
The SCRATCH1 bit is intended for scratching and accepts the reading and writing of 0 and 1. The SCRATCH1 bit
will be set to 0 when the XSTP bit is set to 1 in the control register 2.
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RICOH [ RICOH ELECTRONICS DEVICES DIVISION ]
