DATA SHEET
MAS 35x9F
Table 3–3: Direct configuration registers, continued
2
I C Sub-
address
(hex)
Function
Name
76
DCCF Register (reset = 5050
)
DCCF
hex
DC/DC Converter 2
bit[15]
PUP2: Voltage monitor 2 flag (readback)
2)
bit[14:11]
Converter 2 output voltage with respect to VREF
Code
Nominal
set level
reset level
output volt. of PUP2
of PUP2
3.3 V
3.2 V
3.1 V
3.0 V
2.9 V
2.8 V (reset)
2.7 V
2.6 V
2.5 V
1111
1110
1101
1100
1011
1010
1001
1000
0111
0110
0101
3.5 V
3.4 V
3.3 V
3.2 V
3.1 V
3.0 V
2.9 V
2.8 V
2.7 V
2.6 V
2.5 V
2.4 V
2.3 V
2.2 V
3.4 V
3.3 V
3.2 V
3.1 V
3.0 V
2.9 V
2.8 V
2.7 V
2.6 V
2.5 V
2.4 V
2.3 V
2.2 V
2.1 V
2.4 V
2.3 V
2.2 V
2.1 V
1)
0100
0011
0010
1)
1)
2.0 V
bit[10]
Mode
1
0
pulse frequency modulation (PFM)
pulse width modulation (PWM) (reset)
bit[9:8]
Reserved, must be set to zero
The DC/DC converters are up-converters only. Thus, if the battery voltage is
higher than the selected nominal voltage, the output voltage will exceed the
nominal voltage.
DC/DC Converter 1
bit[7]
PUP1: Voltage monitor 1 flag (readback)
bit[6:3]
Converter 1 output voltage at VSENS1 with respect to VREF
(see bits 14 to 11)
2)
bit[2]
Mode
1
0
pulse frequency modulation (PFM)
pulse width modulation (PWM) (reset)
bit[1:0]
Reserved, must be set to zero
Note, that the reference voltage for DC/DC converter 1 is derived from the
main reference source supplied via pin AVDD1. Therefore, if this DC/DC con-
verter is used, its output must be connected to the analog supply.
The DC/DC converters are up-converters only. Thus, if the battery voltage is
higher than the selected nominal voltage, the output voltage will exceed the
nominal voltage.
1)
refer to Section 4.3.3. on page 60
refer to Section 2.11.2.1.
2)
Micronas
June 30, 2004; 6251-505-1DS
25
MICRONAS [ MICRONAS ]
