000-0046140-111
Page 131 of 169
SLG46140
20.2 VREF Block Diagram
Table 80. VREF Range
VDD
Practical VREF Range Note
2.0 V - 5.5 V
50 mV ~1.2 V
Do not use external Vref when VDD > 5.0 V and T = 85°C
1.7 V - 2.0V
50 mV ~1.1 V
Do not operate above 1.1 V
Figure 82. Voltage Reference Block Diagram
ACMP0_VREF
ACMP1_VREF
reg <500:496>
reg <505:501>
VDD / 3
VDD / 4
ext_vref_acmp1
(Pin5)
ext_vref_acmp0
(Pin4)
ext_vref_acmp0
(Pin5)
reg <506>
01
10
11
reg <528:527>
OP
Vref Out_1 (Pin3)
Pin3_aio_en
reg <767:766>=11
External VDD
2.7 V - 5.5 V
Vref Out_1 is floating in case of reg<528:527>=00
ext_vref_acmp1
(Pin4)
DAC0
ext_vref_acmp1 /2
(Pin5)
ext_vref_acmp0 /2
(Pin4)
ext_vref_acmp0 /2
(Pin5)
ext_vref_acmp1 /2
(Pin4)