参数资料
型号: PIC16LC712T-04I/SO
厂商: Microchip Technology
文件页数: 62/106页
文件大小: 0K
描述: IC MCU OTP 1KX14 A/D PWM 18SOIC
标准包装: 1,100
系列: PIC® 16C
核心处理器: PIC
芯体尺寸: 8-位
速度: 4MHz
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 13
程序存储器容量: 1.75KB(1K x 14)
程序存储器类型: OTP
RAM 容量: 128 x 8
电压 - 电源 (Vcc/Vdd): 2.5 V ~ 5.5 V
数据转换器: A/D 4x8b
振荡器型: 外部
工作温度: -40°C ~ 85°C
封装/外壳: 18-SOIC(0.295",7.50mm 宽)
包装: 带卷 (TR)
其它名称: PIC16LC712T-04ISO
2005 Microchip Technology Inc.
DS41106B-page 57
PIC16C712/716
FIGURE 9-8:
EXTERNAL BROWN-OUT
PROTECTION CIRCUIT 1
FIGURE 9-9:
EXTERNAL BROWN-OUT
PROTECTION CIRCUIT 2
FIGURE 9-10:
EXTERNAL BROWN-OUT
PROTECTION CIRCUIT 3
9.8
Time-out Sequence
On power-up the time-out sequence is as follows: First
PWRT time-out is invoked after the POR time delay has
expired. Then OST is activated. The total time-out will
vary based on oscillator configuration and the status of
the PWRT. For example, in RC mode with the PWRT
disabled, there will be no time-out at all. Figure 9-11,
and
depict
time-out
sequences on power-up.
Since the time-outs occur from the POR pulse, if MCLR
is kept low long enough, the time-outs will expire. Then
bringing MCLR high will begin execution immediately
(Figure 9-13). This is useful for testing purposes or to
synchronize more than one PIC16CXXX device
operating in parallel.
Table 9-5 shows the Reset conditions for some Special
Function Registers, while Table 9-6 shows the Reset
conditions for all the registers.
Note 1: This circuit will activate Reset when
VDD goes below (Vz + 0.7V) where
Vz = Zener voltage.
2: Internal Brown-out Reset circuitry
should be disabled when using this
circuit.
VDD
33k
10k
40k
VDD
MCLR
PIC16C7XX
Q1
Note 1: This brown-out circuit is less expensive,
albeit less accurate. Transistor Q1 turns
off when VDD is below a certain level
such that:
2: Internal Brown-out Reset should be
disabled when using this circuit.
3: Resistors should be adjusted for the
characteristics of the transistor.
VDD x
R1
R1 + R2
= 0.7V
VDD
R2
40k
VDD
MCLR
PIC16C7XX
R1
Q1
This
brown-out
protection
circuit
employs
Microchip Technology’s MCP809 microcontroller
supervisor. The MCP8XX and MCP1XX families
of supervisors provide push-pull and open
collector outputs with both high and low active
Reset pins. There are 7 different trip point
selections to accommodate 5V and 3V systems
MCLR
PIC16C7XX
VDD
VDD
Vss
RST
MCP809
VDD
bypass
capacitor
相关PDF资料
PDF描述
PIC16LC711T-04E/SS IC MCU OTP 1KX14 A/D 20SSOP
PIC16LC711T-04E/SO IC MCU OTP 1KX14 A/D 18SOIC
PIC16LC710T-04/SS IC MCU OTP 512X14 A/D 20SSOP
PIC16LC710T-04I/SS IC MCU OTP 512X14 A/D 20SSOP
PIC16LC710T-04I/SO IC MCU OTP 512X14 A/D 18SOIC
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