參數(shù)資料
型號: PIC16F785
廠商: Microchip Technology Inc.
英文描述: 20-Pin Flash-Based 8-Bit CMOS Microcontroller with Two-Phase Asychronous Feedback PWM, Dual High-Speed Comparators and Dual Operational Amplifiers
中文描述: 20引腳基于閃存的8兩相異步反饋的PWM,雙高位CMOS微控制器的高速比較器和雙運算放大器
文件頁數(shù): 36/178頁
文件大?。?/td> 1620K
代理商: PIC16F785
PIC16F785
DS41249A-page 34
Preliminary
2004 Microchip Technology Inc.
REGISTER 4-2:
TRISA — PORTA TRISTATE REGISTER (ADDRESS: 85h, 185h)
U-0
U-0
R/W-1
R/W-1
TRISA5
TRISA4
4.2
Additional Pin Functions
Every PORTA pin on the PIC16F785 has an interrupt-
on-change option and a weak pull-up option. The next
three sections describe these functions.
4.2.1
WEAK PULL-UPS
Each of the PORTA pins has an individually config-
urable internal weak pull-up. Control bits WPUAx
enable or disable each pull-up. Refer to Register 4-3.
Each weak pull-up is automatically turned off when the
port pin is configured as an output. The pull-ups are dis-
abled on a Power-on Reset by the RAPU bit
(OPTION_REG<7>). The weak pull-up on RA3 is auto-
matically enabled when RA3 is configured as MCLR.
REGISTER 4-3:
WPUA — WEAK PULL-UP REGISTER (ADDRESS: 95h)
(1,2)
U-0
U-0
R/W-1
R/W-1
WPUA5
(4)
WPUA4
(4)
WPUA3
(3)
bit 7
R-1
R/W-1
TRISA2
R/W-1
TRISA1
R/W-1
TRISA0
TRISA3
bit 7
bit 0
bit 7-6:
bit 5-0:
Unimplemented:
Read as ‘
0
TRISA<5:0>:
PORTA Tri-State Control bit
(1)(2)
1
= PORTA pin configured as an input (tri-stated)
0
= PORTA pin configured as an output
Note 1:
TRISA<3> always reads ‘
1
’.
TRISA<5:4> always reads ‘
1
’ in XT, HS and LP OSC modes.
2:
Legend:
R = Readable bit
- n = Value at POR
W = Writable bit
1 = Bit is set
U = Unimplemented bit, read as ‘0’
0 = Bit is cleared
x = Bit is unknown
R/W-1
R/W-1
WPUA2
R/W-1
WPUA1
R/W-1
WPUA0
bit 0
bit 7-6
bit 5-0
Unimplemented:
Read as ‘
0
WPUA<5:0>:
Weak Pull-up Register bits
1
= Pull-up enabled
0
= Pull-up disabled
Note 1:
Global RAPU must be enabled for individual pull-ups to be enabled.
The weak pull-up device is automatically disabled if the pin is in Output mode
(TRISA =
0
).
The RA3 pull-up is automatically enabled when configured as MCLR in the
Configuration Word.
WPUA<5:4> always reads ‘
1
’ in XT, HS and LP OSC modes.
2:
3:
4:
Legend:
R = Readable bit
- n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
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PIC16F785-E/ML 功能描述:8位微控制器 -MCU 3.5 KB 128 RAM 18I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC16F785-E/P 功能描述:8位微控制器 -MCU 14KB 368 RAM 33 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC16F785-E/SO 功能描述:8位微控制器 -MCU 3.5KB FL 128R 18 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC16F785-E/SS 功能描述:8位微控制器 -MCU 3.5KB FL 128R 18 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT
PIC16F785-I/ML 功能描述:8位微控制器 -MCU 3.5 KB 128 RAM 18I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時鐘頻率:50 MHz 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風格:SMD/SMT