AC162078 Microchip Technology, AC162078 Datasheet - Page 185

• Manufacturer Part Number: AC162078
• Description: HEADER INTRFC MPLAB ICD2 18F1330
• Manufacturer: Microchip Technology

Specifications of AC162078

• Accessory Type: Transition Header
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• For Use With/related Products: ICD2
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Not applicable / Not applicable

FIGURE 18-1:
18.2
The full range of voltage reference cannot be realized
due to the construction of the module. The transistors
on the top and bottom of the resistor ladder network
(Figure 18-1) keep CV
reference source rails. The voltage reference is derived
from the reference source; therefore, the CV
changes with fluctuations in that source. The tested
absolute accuracy of the voltage reference can be
found in Section 23.0 “Electrical Characteristics”.
TABLE 18-2:
 2009 Microchip Technology Inc.
CVRCON
CMCON
Legend: Shaded cells are not used with the comparator voltage reference.
Name
Voltage Reference Accuracy/Error
V
AV
CVREN
CVRR
CVREN
REF
C2OUT
DD
Bit 7
REGISTERS ASSOCIATED WITH COMPARATOR VOLTAGE REFERENCE
+
COMPARATOR VOLTAGE REFERENCE BLOCK DIAGRAM
REF
CVRSS = 1
CVRSS = 0
C1OUT
AV
Bit 6
from approaching the
—
SS
CVRSS = x
16 Steps
C0OUT
CVRR
Bit 5
REF
8R
output
R
R
R
R
R
R
R
CVRSS
Bit 4
—
8R
CVR3
Bit 3
18.3
When the device wakes up from Sleep through an
interrupt or a Watchdog Timer time-out, the contents of
the CVRCON register are not affected. To minimize
current consumption in Sleep mode, the voltage
reference should be disabled.
18.4
A device Reset disables the voltage reference by clearing
bit, CVREN (CVRCON<7>). This Reset selects the high-
voltage range by clearing bit, CVRR (CVRCON<5>). The
CVR value select bits are also cleared.
—
CVR3:CVR0
Operation During Sleep
Effects of a Reset
PIC18F1230/1330
CMEN2
CVR2
Bit 2
CVREN = 1
CMEN1
CVR1
Bit 1
CVREN = 0
CMEN0
CV
CVR0
Bit 0
DS39758D-page 185
REF
on Page:
Values
Reset
48
48