Datasheet

PIC24F04KA201 FAMILY
DS39937B-page 142 Preliminary © 2009 Microchip Technology Inc.
REGISTER 18-1: HLVDCON: HIGH/LOW-VOLTAGE DETECT CONTROL REGISTER
R/W-0 U-0 R/W-0 U-0 U-0 U-0 U-0 U-0
HLVDEN
—HLSIDL— — — — —
bit 15 bit 8
R/W-0 R/W-0 R/W-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0
VDIR BGVST IRVST
— HLVDL3 HLVDL2 HLVDL1 HLVDL0
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
-n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
bit 15 HLVDEN: High/Low-Voltage Detect Power Enable bit
1 = HLVD enabled
0 = HLVD disabled
bit 14 Unimplemented: Read as ‘0’
bit 13 HLSIDL: HLVD Stop in Idle Mode bit
1 = Discontinue module operation when device enters Idle mode
0 = Continue module operation in Idle mode
bit 12-8 Unimplemented: Read as ‘0’
bit 7 VDIR: Voltage Change Direction Select bit
1 = Event occurs when voltage equals or exceeds trip point (HLVDL<3:0>)
0 = Event occurs when voltage equals or falls below trip point (HLVDL<3:0>)
bit 6 BGVST: Band Gap Voltage Stable Flag bit
1 = Indicates that the band gap voltage is stable
0 = Indicates that the band gap voltage is unstable
bit 5 IRVST: Internal Reference Voltage Stable Flag bit
1 = Indicates that the internal reference voltage is stable and the high-voltage detect logic generates
the interrupt flag at the specified voltage range
0 = Indicates that the internal reference voltage is unstable and the high-voltage detect logic will not
generate the interrupt flag at the specified voltage range, and the HLVD interrupt should not be
enabled
bit 4 Unimplemented: Read as ‘0’
bit 3-0 HLVDL<3:0>: High/Low-Voltage Detection Limit bits
1111 = External analog input is used (input comes from the HLVDIN pin)
1110 = Trip point 1
(1)
1101 = Trip point 2
(1)
1100 = Trip point 3
(1)
.
.
.
0000 = Trip point 15
(1)
Note 1: For actual trip point, refer to Section 26.0 “Electrical Characteristics”.