PIC16F914-I/PT Microchip Technology, PIC16F914-I/PT Datasheet - Page 127

• Manufacturer Part Number: PIC16F914-I/PT
• Description: IC PIC MCU FLASH 4KX14 44TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 16Fr

Specifications of PIC16F914-I/PT

• Program Memory Type: FLASH
• Program Memory Size: 7KB (4K x 14)
• Package / Case: 44-TQFP, 44-VQFP
• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LCD, POR, PWM, WDT
• Number Of I /o: 35
• Eeprom Size: 256 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC16F
• Core: PIC
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: SSP/I2C/AUSART/SPI
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 35
• Number Of Timers: 3
• Operating Supply Voltage: 2 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52715-96, 52716-328, 52717-734
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, ICE2000, DV164120, DM163029
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8-ch x 10-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT44PT3 - SOCKET TRAN ICE 44MQFP/TQFPAC164305 - MODULE SKT FOR PM3 44TQFP444-1001 - DEMO BOARD FOR PICMICRO MCUAC164020 - MODULE SKT PROMATEII 44TQFP
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

10.0
The Programmable Low-Voltage Detect module is an
interrupt driven supply level detection. The voltage
detection monitors the internal power supply.
10.1
The PIC16F91X device supports eight internal PLVD
trip points. See Register 10-1 for available PLVD trip
point voltages.
REGISTER 10-1:
TABLE 10-1:
 2004 Microchip Technology Inc.
0Bh/8Bh/
10Bh/18Bh
0Dh
8Dh
109h
Legend:
Address
PROGRAMMABLE
LOW-VOLTAGE DETECT
(PLVD) MODULE
Voltage Trip Points
bit 7-6
bit 5
bit 4
bit 3
bit 2-0
x = unknown, u = unchanged, — = unimplemented, read as ‘0’. Shaded cells are not used by the PLVD module.
INTCON
PIR2
PIE2
LVDCON
Name
REGISTERS ASSOCIATED WITH PROGRAMMABLE LOW-VOLTAGE DETECT
LVDCON – LOW-VOLTAGE DETECT CONTROL REGISTER (ADDRESS: 109h)
OSFIF
OSFIE
bit 7
Unimplemented: Read as ‘0’
IRVST: Internal Reference Voltage Stable Status Flag bit
1 = Indicates that the PLVD is stable and PLVD interrupt is reliable
0 = Indicates that the PLVD is not stable and PLVD interrupt should not be enabled
LVDEN: Low-Voltage Detect Power Enable bit
1 = Enables PLVD, powers up PLVD circuit and supporting reference circuitry
0 = Disables PLVD, powers down PLVD and supporting circuitry
Unimplemented: Read as ‘0’
LVDL<2:0>: Low-Voltage Detection Limit bits (nominal values)
111 = 4.5V
110 = 4.2V
101 = 4.0V
100 = 2.3V (default)
011 = 2.2V
010 = 2.1V
001 = 2.0V
000 = 1.9V
Legend:
R = Readable bit
- n = Value at POR
Bit 7
GIE
—
Note 1: Not tested and below minimum V
U-0
—
PEIE
Bit 6
C2IF
C2IE
—
(1)
U-0
—
IRVST
C1IE
Bit 5
T0IE
C1IF
IRVST
LVDEN
LCDIF
LCDIE
R-0
INTE
Bit 4
Preliminary
W = Writable bit
‘1’ = Bit is set
RBIE
Bit 3
LVDEN
—
—
—
R/W-0
10.1.1
The PIC16F91X stores the PLVD calibration values in
fuses located in the Calibration Word 2 (2009h). The
Calibration Word 2 is not erased when using the spec-
ified bulk erase sequence in the “PIC16F91X Memory
Programming Specification” (DS41244) and thus, does
not require reprogramming.
LVDIE
LVDL2
LVDIF
DD
Bit 2
T0IF
.
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
U-0
—
PLVD CALIBRATION
LVDL1
INTF
Bit 1
—
—
CCP2IF 0000 -0-0 0000 -0-0
CCP2IE 0000 -0-0 0000 -0-0
LVDL2
R/W-1
LVDL0
Bit 0
RBIF
PIC16F91X
0000 000x 0000 000x
--00 -100 --00 -100
POR, BOR
Value on
x = Bit is unknown
LVDL1
R/W-0
DS41250B-page 125
Value on
all other
Resets
LVDL0
R/W-0
bit 0