MCP1631RD-MCC1 Microchip Technology, MCP1631RD-MCC1 Datasheet - Page 143

• Manufacturer Part Number: MCP1631RD-MCC1
• Description: REFERENCE DESIGN FOR MCP1631HV
• Manufacturer: Microchip Technology
• Type: Battery Managementr

Specifications of MCP1631RD-MCC1

• Main Purpose: Power Management, Battery Charger
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: MCP1631HV, PIC16F883
• Primary Attributes: 1 ~ 2 Cell- Li-Ion, 1 ~ 4 Cell- NiCd/NiMH
• Secondary Attributes: Status LEDs
• Supported Devices: MCP1631HV, PIC16F883 Device Type
• Tool / Board Applications: Power Management-Battery Management
• Development Tool Type: Reference Design
• Input Voltage: 5.5 V to 16 V
• Product: Power Management Modules
• Mcu Supported Families: MCP1631HV/PIC16F883 Family
• Silicon Manufacturer: Microchip
• Silicon Core Number: MCP1631HV
• Kit Application Type: Reference Design
• Application Sub Type: Battery Charger
• Kit Contents: Board Only
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: MCP1631HV, PIC16F883
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

11.6.4
The PWM mode supports an Auto-Shutdown mode that
will disable the PWM outputs when an external
shutdown event occurs. Auto-Shutdown mode places
the PWM output pins into a predetermined state. This
mode is used to help prevent the PWM from damaging
the application.
The auto-shutdown sources are selected using the
ECCPAS<2:0> bits of the ECCPAS register. A shutdown
event may be generated by:
• A logic ‘0’ on the INT pin
• Comparator C1
• Comparator C2
• Setting the ECCPASE bit in firmware
FIGURE 11-14:
© 2009 Microchip Technology Inc.
From Comparator C2
From Comparator C1
INT
ENHANCED PWM AUTO-
SHUTDOWN MODE
ECCPAS<2:0>
AUTO-SHUTDOWN BLOCK DIAGRAM
111
110
101
100
011
010
001
000
From Data Bus
Write to ECCPASE
PRSEN
PIC16F882/883/884/886/887
R
D
Q
S
A shutdown condition is indicated by the ECCPASE
(Auto-Shutdown Event Status) bit of the ECCPAS
register. If the bit is a ‘0’, the PWM pins are operating
normally. If the bit is a ‘1’, the PWM outputs are in the
shutdown state.
When a shutdown event occurs, two things happen:
The ECCPASE bit is set to ‘1’. The ECCPASE will
remain set until cleared in firmware or an auto-restart
occurs (see Section 11.6.5 “Auto-Restart Mode”).
The enabled PWM pins are asynchronously placed in
their shutdown states. The PWM output pins are
grouped into pairs [P1A/P1C] and [P1B/P1D]. The state
of each pin pair is determined by the PSSAC and
PSSBD bits of the ECCPAS register. Each pin pair may
be placed into one of three states:
• Drive logic ‘1’
• Drive logic ‘0’
• Tri-state (high-impedance)
ECCPASE
PSSAC<1>
PSSAC<1>
PSSBD<1>
PSSBD<1>
PSSAC<0>
P1A_DRV
PSSAC<0>
P1C_DRV
PSSBD<0>
P1B_DRV
PSSBD<0>
P1D_DRV
TRISx
TRISx
TRISx
TRISx
1
0
1
0
1
0
1
0
DS41291F-page 141
P1A
P1C
P1B
P1D