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)： 45/178頁
文件大?。?/td> 1620K
代理商： PIC16F785
2004 Microchip Technology Inc.
Preliminary
DS41249A-page 43
PIC16F785
4.4
PORTC and TRISC Registers
PORTC is an 8-bit wide, bidirectional port. The corre-
sponding data direction register is TRISC
(Register 4-8). Setting a TRISC bit (=
1
) will make the
corresponding PORTC pin an input (i.e., put the corre-
sponding output driver in a High-impedance mode).
Clearing a TRISC bit (=
0
) will make the corresponding
PORTC pin an output (i.e., put the contents of the out-
put latch on the selected pin). Example 4-3 shows how
to initialize PORTC.
Reading the PORTC register (Register 4-7) reads the
status of the pins, whereas writing to it will write to the
port latch. All write operations are read-modify-write
operations. Therefore, a write to a port implies that the
port pins are read, this value is modified and then
written to the port data latch.
The TRISC register controls the direction of the
PORTC pins, even when they are being used as
analog inputs. The user must ensure the bits in the
TRISC register are maintained set when using them as
analog inputs. I/O pins configured as analog input
always read ‘
0
’
.
When RC4 or RC5 is configured as an op amp output,
the corresponding RC4 or RC5 digital output driver will
automatically be disabled regardless of the TRISC<4>
or TRISC<5> value.
EXAMPLE 4-3:
BCF
BCF
CLRF
BSF
CLRF
CLRF
MOVLW
MOVWF
INITIALIZING PORTC
;Bank 0
REGISTER 4-7:
PORTC — PORTC REGISTER (ADDRESS: 07h, 107h)
R/W-x
(1)
R/W-x
(1)
R/W-x
R/W-x
RC7
RC6
RC5
bit 7
REGISTER 4-8:
TRISC — PORTC TRISTATE REGISTER (ADDRESS: 87h, 187h)
R/W-1
R/W-1
R/W-1
R/W-1
TRISC7
TRISC6
TRISC5
TRISC4
bit 7
Note:
The ANSEL0 (91h) and ANSEL1 (93h)
registers must be initialized to configure
an analog channel as a digital input. Pins
configured as analog inputs will read ‘
0
’.
STATUS,RP0
STATUS,RP1
PORTC
STATUS,RP0
ANSEL0
ANSEL1
0Ch
TRISC
;Init PORTC
;Bank 1
;digital I/O
;digital I/O
;Set RC<3:2> as inputs
; and set RC<5:4,1:0>
; as outputs
;Bank 0
BCF
STATUS,RP0
R/W-x
(1)
RC3
R/W-x
(1)
RC2
R/W-x
(1)
RC1
R/W-x
(1)
RC0
RC4
bit 0
bit 7-0:
RC<7:0>:
PORTC General Purpose I/O Pin bits
1
= Port pin is greater than V
IH
0
= Port pin is less than V
IL
Note 1:
Data latches are unknown after a POR, but each port bit reads ‘
0
’ when the corre-
sponding analog select bit is ‘
1
’ (see Register 12-1 and Register 12-2 on page 80).
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
TRISC3
R/W-1
TRISC2
R/W-1
TRISC1
R/W-1
TRISC0
bit 0
bit 7-0:
TRISC<7:0>:
PORTC Tri-State Control bits
1
= PORTC pin configured as an input (tri-stated)
0
= PORTC pin configured as an output
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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相關代理商/技術參數(shù)
參數(shù)描述
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
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