參數(shù)資料
型號(hào): PIC16F716-I/ML
廠商: Microchip Technology
文件頁數(shù): 91/136頁
文件大?。?/td> 0K
描述: IC PIC MCU FLASH 2KX14 28QFN
標(biāo)準(zhǔn)包裝: 61
系列: PIC® 16F
核心處理器: PIC
芯體尺寸: 8-位
速度: 20MHz
外圍設(shè)備: 欠壓檢測(cè)/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 13
程序存儲(chǔ)器容量: 3.5KB(2K x 14)
程序存儲(chǔ)器類型: 閃存
RAM 容量: 128 x 8
電壓 - 電源 (Vcc/Vdd): 2 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 4x8b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 28-VQFN 裸露焊盤
包裝: 管件
PIC16F716
DS41206B-page 56
2007 Microchip Technology Inc.
8.3.8
ENHANCED PWM AUTO-
SHUTDOWN MODE
The PWM mode supports an Auto-Shutdown mode that
will disable the PWM outputs when an external
shutdown event occurs. Auto-Shutdown mode places
the PWM output pins into a predetermined state. This
mode is used to help prevent the PWM from damaging
the application.
The auto-shutdown sources are selected using the
ECCPASx bits of the ECCPAS register. A shutdown
event may be generated by:
A logic ‘0’ on the INT pin
Setting the ECCPASE bit in firmware
A shutdown condition is indicated by the ECCPASE
(Auto-Shutdown Event Status) bit of the ECCPAS
register. If the bit is a ‘0’, the PWM pins are operating
normally. If the bit is a ‘1’, the PWM outputs are in the
shutdown state. Refer to Figure 8-5.
When a shutdown event occurs, two things happen:
The ECCPASE bit is set to ‘1’. The ECCPASE will
remain set until cleared in firmware or an auto-restart
The enabled PWM pins are asynchronously placed in
their shutdown states. The PWM output pins are
grouped into pairs [P1A/P1C] and [P1B/P1D]. The state
of each pin pair is determined by the PSSAC and
PSSBD bits of the ECCPAS register. Each pin pair may
be placed into one of three states:
Drive logic ‘1’
Drive logic ‘0’
Tri-state (high-impedance)
FIGURE 8-5:
AUTO-SHUTDOWN BLOCK DIAGRAM
PSSAC<1>
TRISx
P1A
0
1
P1A_DRV
PSSAC<0>
PSSBD<1>
TRISx
P1B
0
1
PSSBD<0>
P1B_DRV
PSSAC<1>
TRISx
P1C
0
1
PSSAC<0>
P1C_DRV
PSSBD<1>
TRISx
P1D
0
1
PSSBD<0>
P1D_DRV
000
001
010
011
100
101
110
111
From Comparator C2
From Comparator C1
ECCPAS<2:0>
R
DQ
S
ECCPASE
From Data Bus
Write to ECCPASE
PRSEN
INT
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