PIC18C658-E/PT Microchip Technology, PIC18C658-E/PT Datasheet - Page 249
![IC MCU OTP 16KX16 CAN 64TQFP](/photos/6/81/68123/c04-066_pf_sml.jpg)
PIC18C658-E/PT
Manufacturer Part Number
PIC18C658-E/PT
Description
IC MCU OTP 16KX16 CAN 64TQFP
Manufacturer
Microchip Technology
Series
PIC® 18Cr
Datasheets
1.PIC16F616T-ISL.pdf
(8 pages)
2.PIC16C770-ISO.pdf
(8 pages)
3.PIC18C658-IPT.pdf
(366 pages)
4.PIC18C658-IPT.pdf
(16 pages)
5.PIC18C658-IPT.pdf
(16 pages)
6.PIC18C658-IPT.pdf
(16 pages)
Specifications of PIC18C658-E/PT
Core Processor
PIC
Core Size
8-Bit
Speed
40MHz
Connectivity
CAN, I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, LVD, POR, PWM, WDT
Number Of I /o
52
Program Memory Size
32KB (16K x 16)
Program Memory Type
OTP
Ram Size
1.5K x 8
Voltage - Supply (vcc/vdd)
4.2 V ~ 5.5 V
Data Converters
A/D 12x10b
Oscillator Type
External
Operating Temperature
-40°C ~ 125°C
Package / Case
64-TFQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Other names
PIC18C658E/PT
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
PIC18C658-E/PT
Manufacturer:
Microchip Technology
Quantity:
10 000
- PIC16F616T-ISL PDF datasheet
- PIC16C770-ISO PDF datasheet #2
- PIC18C658-IPT PDF datasheet #3
- PIC18C658-IPT PDF datasheet #4
- PIC18C658-IPT PDF datasheet #5
- PIC18C658-IPT PDF datasheet #6
- Current page: 249 of 366
- Download datasheet (7Mb)
21.2
Depending on the power source for the device voltage,
the voltage normally decreases relatively slowly. This
means that the LVD module does not need to be con-
stantly operating. To decrease current consumption,
the LVD circuitry only needs to be enabled for short
periods, where the voltage is checked. After doing the
check, the LVD module may be disabled.
Each time that the LVD module is enabled, the circuitry
requires some time to stabilize. After the circuitry has
stabilized, all status flags may be cleared. The module
will then indicate the proper state of the system.
FIGURE 21-3: LOW VOLTAGE DETECT WAVEFORMS
2000 Microchip Technology Inc.
Internally Generated
Reference Stable
Internally Generated
Reference Stable
CASE 1:
CASE 2:
Enable LVD
Enable LVD
Operation
LVDIF
LVDIF
V
V
DD
DD
Advanced Information
50 ms
50 ms
LVDIF may not be set
LVDIF cleared in software,
LVDIF remains set since LVD condition still exists
The following steps are needed to setup the LVD
module:
1.
2.
3.
4.
5.
6.
Figure 21-3 shows typical waveforms that the LVD
module may be used to detect.
Write the value to the LVDL3:LVDL0 bits
(LVDCON register), which selects the desired
LVD Trip Point.
Ensure that LVD interrupts are disabled (the
LVDIE bit is cleared or the GIE bit is cleared).
Enable the LVD module (set the LVDEN bit in
the LVDCON register).
Wait for the LVD module to stabilize (the IRVST
bit to become set).
Clear the LVD interrupt flag, which may have
falsely become set, until the LVD module has
stabilized (clear the LVDIF bit).
Enable the LVD interrupt (set the LVDIE and the
GIE bits).
LVDIF cleared in software
PIC18CXX8
LVDIF cleared in software
V
.
V
DS30475A-page 249
LVD
LVD
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