参数资料
型号: PIC16F716-I/ML
厂商: Microchip Technology
文件页数: 105/136页
文件大小: 0K
描述: IC PIC MCU FLASH 2KX14 28QFN
标准包装: 61
系列: PIC® 16F
核心处理器: PIC
芯体尺寸: 8-位
速度: 20MHz
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: 3.5KB(2K x 14)
程序存储器类型: 闪存
RAM 容量: 128 x 8
电压 - 电源 (Vcc/Vdd): 2 V ~ 5.5 V
数据转换器: A/D 4x8b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 28-VQFN 裸露焊盘
包装: 管件
PIC16F716
DS41206B-page 68
2007 Microchip Technology Inc.
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 9-10,
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 9-12). This is useful for testing purposes or to
synchronize more than one PIC16F716 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.
9.9
Power Control/STATUS Register
(PCON)
The Power Control/STATUS Register, PCON has two
bits.
Bit 0 is the Brown-out Reset Status bit, BOR. If the
BOREN Configuration bit is set, BOR is ‘1’ on
Power-on Reset and reset to ‘0’ when a Brown-out con-
dition occurs. BOR must then be set by the user and
checked on subsequent resets to see if it is clear, indi-
cating that another Brown-out has occurred.
If the BOREN Configuration bit is clear, BOR is
unknown on Power-on Reset.
Bit 1 is POR (Power-on Reset Status bit). It is cleared
on a Power-on Reset and unaffected otherwise. The
user must set this bit following a Power-on Reset.
TABLE 9-3:
TIME-OUT IN VARIOUS SITUATIONS
TABLE 9-4:
STATUS BITS AND THEIR SIGNIFICANCE
Oscillator Configuration
Power-up or Brown-out
Wake-up from Sleep
PWRTE = 0
PWRTE = 1
XT, HS, LP
72 ms + 1024 TOSC
1024 TOSC
RC
72 ms
POR
BOR
TO
PD
0x
1
Power-on Reset (BOREN = 0)
01
1
Power-on Reset (BOREN = 1)
0x
0
x
Illegal, TO is set on POR
0x
x
0
Illegal, PD is set on POR
10
1
Brown-out Reset
11
0
1
WDT Reset
11
0
WDT Wake-up
11
u
MCLR Reset during normal operation
11
1
0
MCLR Reset during Sleep or interrupt wake-up from Sleep
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