PIC16F688 Datasheet, PDF (63/174 Pages) Microchip Technology – 14-Pin Flash-Based, 8-Bit CMOS Microcontrollers with nanoWatt Technology

PIC16F688
REGISTER 7-3:
VRCON – VOLTAGE REFERENCE CONTROL REGISTER (ADDRESS: 99h)
R/W-0
U-0
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
VREN
—
VRR
—
VR3
VR2
VR1
VR0
bit 7
bit 0
bit 7
bit 6
bit 5
bit 4
bit 3-0
VREN: CVREF Enable bit
1 = CVREF circuit powered on
0 = CVREF circuit powered down, no IDD drain and CVREF = VSS.
Unimplemented: Read as ‘0’
VRR: CVREF Range Selection bit
1 = Low range
0 = High range
Unimplemented: Read as ‘0’
VR<3:0>: CVREF value selection 0 ≤ VR<3:0> ≤ 15
When VRR = 1: CVREF = (VR<3:0>/24) * VDD
When VRR = 0: CVREF = VDD/4 + (VR<3:0>/32) * VDD
Legend:
R = Readable bit
- n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
TABLE 7-2: REGISTERS ASSOCIATED WITH COMPARATOR MODULE
Address Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
POR, BOD
Value on
all other
Resets
0Bh/8Bh INTCON
GIE
PEIE
T0IE
INTE
RAIE
T0IF
INTF
RAIF 0000 0000 0000 0000
0Ch
PIR1
EEIF
ADIF
RCIF
C2IF
C1IF
OSFIF
TXIF TMR1IF 0000 0000 0000 0000
19h
CMCON0 C2OUT C1OUT C2INV C1INV
CIS
CM2
CM1
CM0 0000 0000 0000 0000
1Ah
CMCON1
—
—
—
—
—
—
T1GSS C2SYNC ---- --10 ---- --10
85h/185h TRISA
—
—
TRISA5 TRISA4 TRISA3 TRISA2 TRISA1 TRISA0 --11 1111 --11 1111
87h/187h TRISC
—
—
TRISC5 TRISC4 TRISC3 TRISC2 TRISC1 TRISC0 --11 1111 --11 1111
8Ch
PIE1
EEIE
ADIE
RCIE
C2IE
C1IE OSFIE TXIE TMR1IE 0000 0000 0000 0000
99h
VRCON
VREN
—
VRR
—
VR3
VR2
VR1
VR0 0-0- 0000 0-0- 0000
Legend: x = unknown, u = unchanged, - = unimplemented, read as ‘0’. Shaded cells are not used by the comparator or Comparator Voltage
Reference module.
 2004 Microchip Technology Inc.
Preliminary
DS41203B-page 61