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参数资料
型号： PIC16C711-20E/P
厂商： Microchip Technology
文件页数： 136/177页
文件大小： 0K
描述： IC MCU OTP 1KX14 A/D 18DIP
产品培训模块： Asynchronous Stimulus
标准包装： 25
系列： PIC® 16C
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，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： 68 x 8
电压 - 电源 (Vcc/Vdd)： 4 V ~ 6 V
数据转换器： A/D 4x8b
振荡器型： 外部
工作温度： -40°C ~ 125°C
封装/外壳： 18-DIP（0.300"，7.62mm）
包装： 管件
1997 Microchip Technology Inc.
DS30272A-page 61
PIC16C71X
8.5
Interrupts
The PIC16C71X family has 4 sources of interrupt.
The interrupt control register (INTCON) records indi-
vidual interrupt requests in ag bits. It also has individ-
ual and global interrupt enable bits.
A global interrupt enable bit, GIE (INTCON<7>)
enables (if set) all un-masked interrupts or disables (if
cleared) all interrupts. When bit GIE is enabled, and an
interrupt’s ag bit and mask bit are set, the interrupt will
vector immediately. Individual interrupts can be dis-
abled through their corresponding enable bits in vari-
ous
registers.
Individual
interrupt
bits
are
set
regardless of the status of the GIE bit. The GIE bit is
cleared on reset.
The “return from interrupt” instruction, RETFIE, exits
the interrupt routine as well as sets the GIE bit, which
re-enables interrupts.
The RB0/INT pin interrupt, the RB port change inter-
rupt and the TMR0 overow interrupt ags are con-
tained in the INTCON register.
The peripheral interrupt ags are contained in the spe-
cial function registers PIR1 and PIR2. The correspond-
ing interrupt enable bits are contained in special
function registers PIE1 and PIE2, and the peripheral
interrupt enable bit is contained in special function reg-
ister INTCON.
When an interrupt is responded to, the GIE bit is
cleared to disable any further interrupt, the return
address is pushed onto the stack and the PC is loaded
with 0004h. Once in the interrupt service routine the
source(s) of the interrupt can be determined by polling
the interrupt ag bits. The interrupt ag bit(s) must be
cleared in software before re-enabling interrupts to
avoid recursive interrupts.
Applicable Devices
710 71 711 715
Interrupt Sources
External interrupt RB0/INT
TMR0 overow interrupt
PORTB change interrupts (pins RB7:RB4)
A/D Interrupt
Note:
Individual interrupt ag bits are set regard-
less of the status of their corresponding
mask bit or the GIE bit.
For external interrupt events, such as the INT pin or
PORTB change interrupt, the interrupt latency will be
three or four instruction cycles. The exact latency
depends when the interrupt event occurs (Figure 8-19).
The latency is the same for one or two cycle instruc-
tions. Individual interrupt ag bits are set regardless of
the status of their corresponding mask bit or the GIE
bit.
Note:
For the PIC16C71
If an interrupt occurs while the Global Inter-
rupt Enable (GIE) bit is being cleared, the
GIE bit may unintentionally be re-enabled
by the user’s Interrupt Service Routine (the
RETFIE
instruction). The
events
that
would cause this to occur are:
1.
An instruction clears the GIE bit while
an interrupt is acknowledged.
2.
The program branches to the Interrupt
vector and executes the Interrupt Ser-
vice Routine.
3.
The Interrupt Service Routine com-
pletes with the execution of the RET-
FIE
instruction. This causes the GIE
bit to be set (enables interrupts), and
the program returns to the instruction
after the one which was meant to dis-
able interrupts.
Perform the following to ensure that inter-
rupts are globally disabled:
LOOP BCF
INTCON, GIE
; Disable global
;
interrupt bit
BTFSC INTCON, GIE
; Global interrupt
;
disabled?
GOTO
LOOP
; NO, try again
:
;
Yes, continue
;
with program
;
flow
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相关代理商/技术参数
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PIC16C711-20I/P 制造商:Microchip Technology Inc 功能描述:IC 8BIT CMOS MCU 16C711 DIP18
PIC16C711-20I/P 制造商:Microchip Technology Inc 功能描述:Microcontroller IC Num of I/Os:13
PIC16C711-20I/SO 功能描述:8位微控制器 -MCU 1.75KB 68 RAM 13 I/O 20MHz IndTemp SOIC18 RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC16C711-20I/SS 功能描述:8位微控制器 -MCU 1.75KB 68 RAM 13 I/O 20MHz IndTemp SSOP20 RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
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