Fujitsu 8FX

MB95630H Series
MN702-00009-2v0-E FUJITSU SEMICONDUCTOR LIMITED 287
CHAPTER 16 LOW-VOLTAGE DETECTION RESET CIRCUIT
16.5 Register
16.5.1 LVD Reset Voltage Selection ID Register (LVDR)
The LVD reset voltage selection ID register (LVDR) selects the reset threshold
voltage.
■ Register Configuration
■ Register Functions
[bit7:0] LVRS[7:0]: LVD reset voltage select bits
These bits select the reset threshold voltage with an 8-bit code. They are cleared upon a power-on reset.
Note:
The reset of the low-voltage detection reset circuit has no effect on the reset threshold
voltage settings as the reset cannot clear this register.
bit 7 6 5 4 3 2 1 0
Field LVRS7 LVRS6 LVRS5 LVRS4 LVRS3 LVRS2 LVRS1 LVRS0
Attribute 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
bit7:0
Reset threshold voltage
Detection voltage (typical value) Release voltage (typical value)
Writing "01010101" 2.7 V 2.8 V
Writing "01011010" 3 V 3.1 V
Writing "10101010" 3.2 V 3.3 V
Writing a value other than the above 2.6 V 2.7 V