Rohm LAPIS SEMICONDUCTOR ML620Q503, User Manual

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ML620Q503/Q504 User's Manual
Chapter 28 Voltage Level Supervisor
FEUL620Q504 28-3
28.2.2 Voltage level supervisor control register (VLSCON)
Address: 0F900H
Access: R/W
Access size: 8/16 bit
Initial value: 0000H
7 6 5 4 3 2 1 0
VLSCONL – – – – VLSLV3 VLSLV2 VLSLV1 VLSLV0
R/W R/W R/W R/W R/W R/W R/W R/W R/W
Initial value* 0 0 0 0 0 0 0 0
15 14 13 12 11 10 9 8
VLSCONH – – – – – VLSRF VLSF ENVLS
R/W R/W R/W R/W R/W R/W R R R/W
Initial value* 0 0 0 0 0 0 0 0
*: it is not reset when VLS reset is issued.
VLSCON is a special function register (SFR) used to control the voltage level detector.
Description of Bits
•
VLSLV3-0 (bits 3 to 0)
The VLSLV3-0 bits are used to select the VLS threshold voltage of fall (V
VLS
). The VLS has the
hysteresis characteristics (H
VLS
). The threshold voltage of rise is V
VLS
+ H
VLS
. For detail, see VLS
characteristic in Appendix C. They should be set when the VLS is in the OFF state (ENVLS=”0”).
VLSLV3 VLSLV2 VLSLV1 VLSLV0 Description
0 0 0 0 Use prohibit (initial value)
0 0 0 1 Use prohibit
0 0 1 0 Use prohibit
0 0 1 1 1.898±0.10V
0 1 0 0 2.000±0.10V
0 1 0 1 2.093±0.10V
0 1 1 0 2.196±0.10V
0 1 1 1 2.309±0.10V
1 0 0 0 2.409±0.10V
1 0 0 1 2.605±0.10V
1 0 1 0 2.800±0.10V
1 0 1 1 3.068±0.10V
1 1 * * Use prohibit