参数资料
型号: DSPIC33FJ12MC202-E/SO
厂商: Microchip Technology
文件页数: 69/155页
文件大小: 0K
描述: IC DSPIC MCU/DSP 12K 28SOIC
产品培训模块: Asynchronous Stimulus
标准包装: 27
系列: dsPIC™ 33F
核心处理器: dsPIC
芯体尺寸: 16-位
速度: 40 MIP
连通性: I²C,IrDA,SPI,UART/USART
外围设备: 高级欠压探测/复位,电机控制 PWM,QEI,POR,PWM,WDT
输入/输出数: 21
程序存储器容量: 12KB(12K x 8)
程序存储器类型: 闪存
RAM 容量: 1K x 8
电压 - 电源 (Vcc/Vdd): 3 V ~ 3.6 V
数据转换器: A/D 6x10b/12b
振荡器型: 内部
工作温度: -40°C ~ 125°C
封装/外壳: 28-SOIC(0.295",7.50mm 宽)
包装: 管件
配用: AC164339-ND - MODULE SKT FOR PM3 28SOIC
DM240001-ND - BOARD DEMO PIC24/DSPIC33/PIC32
2010 Microchip Technology Inc.
DS41303G-page 295
PIC18F2XK20/4XK20
22.2
HLVD Setup
The following steps are needed to set up the HLVD
module:
1.
Write the value to the HLVDL<3:0> bits that
selects the desired HLVD trip point.
2.
Set the VDIRMAG bit to detect high voltage
(VDIRMAG = 1) or low voltage (VDIRMAG = 0).
3.
Enable the HLVD module by setting the
HLVDEN bit.
4.
Clear the HLVD interrupt flag bit of the PIR2
register, which may have been set from a
previous interrupt.
5.
Enable the HLVD interrupt if interrupts are
desired by setting the HLVDIE bit of the PIE2
register, and the GIE and PEIE bits of the INT-
CON register. An interrupt will not be generated
until the IRVST bit is set.
22.3
Current Consumption
When the module is enabled, the HLVD comparator
and voltage divider are enabled and will consume static
current. The total current consumption, when enabled,
is specified in electrical specification parameter D024B.
Depending on the application, the HLVD module does
not need to be operating constantly. To decrease the
current requirements, the HLVD circuitry may only
need to be enabled for short periods where the voltage
is checked. After doing the check, the HLVD module
may be disabled.
22.4
HLVD Start-up Time
The internal reference voltage of the HLVD module,
specified in electrical specification parameter D420,
may be used by other internal circuitry, such as the
Programmable Brown-out Reset. If the HLVD or other
circuits using the voltage reference are disabled to
lower the device’s current consumption, the reference
voltage circuit will require time to become stable before
a low or high-voltage condition can be reliably
detected. This start-up time, TIRVST, is an interval that
is independent of device clock speed. It is specified in
electrical specification parameter 36.
The HLVD interrupt flag is not enabled until TIRVST has
expired and a stable reference voltage is reached. For
this reason, brief excursions beyond the set point may
not be detected during this interval. Refer to Figure 22-2
FIGURE 22-2:
LOW-VOLTAGE DETECT OPERATION (VDIRMAG = 0)
VHLVD
VDD
HLVDIF
VHLVD
VDD
Enable HLVD
TIVRST
HLVDIF may not be set
Enable HLVD
HLVDIF
HLVDIF cleared by software
HLVDIF cleared by software,
CASE 1:
CASE 2:
HLVDIF remains set since HLVD condition still exists
TIVRST
Internal Reference is stable
IRVST
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