ACT5880
Rev 2, 03-Sep-13
REGISTER AND BIT DESCRIPTIONS
DEFAULT
ADDRESS
BLOCK
NAME
and
DESCRIPTION
and BIT
ACCESS
Reset Timer Setting. Defines the reset time-out threshold. Reset
7
TRST
0
0
W/R time-out is 65ms when value is 1, reset time-out is 260ms when
value is 0.
SYSLEV Mode Select. Defines the response to the SYSLEV
voltage detector, 0: automatic shut down when VVSYS falls below
the programmed VSYSLEV threshold, 1: Generate an interrupt
6
nSYSMODE
W/R
when VVSYS falls below the programmed VSYSLEV threshold.
System Voltage Level Interrupt Mask. SYSLEV interrupt is
W/R
5
4
nSYSLVMSK
nSYSSTAT
0
0
masked by default, set to 1 to unmask this interrupt.
0x00
VVSYS Status Indication. Value is 0 when VVSYS > VSYSLEV,
R
value is 1 when VVSYS < VSYSLEV.
4 bits to set the threshold of VSYSLEV. SYSLEV[3:0] = 0000 is for
2.2V. The voltage is linear coded with LSB for 0.1V in the range
of 2.2V to 3.7V, where LSB is SYSLEV[0]. The hysteresis is
0.2V in rising.
3
2
1
0
7
6
SYSLEV[3]
SYSLEV[2]
SYSLEV[1]
SYSLEV[0]
EVENT1
0
0
0
0
0
0
W/R
The setting is effective only when VVSYS > VUVLO
.
SYS
For internal use only.
For internal use only.
WE/R
WE/R
EVENT2
Write 1 to enable the sleep mode of REG2, 0 to enable the
normal buck mode operation of REG2.
5
EVENT4
0
W/R
For internal use only.
4
3
2
1
0
RFU
0
x
x
x
x
WE/R
0x01
4 bits scratch register for the equipment system to use. Data in
those bits are kept until the VSYS loses.
SCRATCH[3]
SCRATCH[2]
SCRATCH[1]
SCRATCH[0]
W/R
W/R
Set to 0x80 before setting nWKALM and RAAI.
Set to 0x08 before setting nWKALM and RAAI.
0x3C
0x3D
[7:0]
[7:0]
Note:
W/R: Write and read accessible. R: Read accessible, writing to the bit does not make change to the volume. WE/R: Write
and read accessible, write exact what it is before to avoid unexpected behavior. X is uncertain volume.
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