參數(shù)資料
型號(hào): pic16c556a
廠商: Microchip Technology Inc.
英文描述: EPROM-Based 8-Bit CMOS Microcontroller(8位CMOS微控制器)
中文描述: 存儲(chǔ)器為基礎(chǔ)的8位CMOS微控制器(8位的CMOS微控制器)
文件頁(yè)數(shù): 23/96頁(yè)
文件大小: 1010K
代理商: PIC16C556A
1997 Microchip Technology Inc.
Preliminary
DS40143B-page 23
PIC16C55X(A)
5.0
I/O PORTS
The PIC16C55X(A) have two ports, PORTA and PORTB.
5.1
PORTA and TRISA Registers
PORTA is a 5-bit wide latch. RA4 is a Schmitt Trigger input
and an open drain output. Port RA4 is multiplexed with the
T0CKI clock input. All other RA port pins have Schmitt
Trigger input levels and full CMOS output drivers. All pins
have data direction bits (TRIS registers) which can config-
ure these pins as input or output.
A '1' in the TRISA register puts the corresponding output
driver in a hi- impedance mode. A '0' in the TRISA register
puts the contents of the output latch on the selected pin(s).
Reading the PORTA register reads the status of the pins,
whereas writing to it will write to the port latch. All write
operations are read-modify-write operations. So a write
to a port implies that the port pins are first read, then this
value is modified and written to the port data latch.
FIGURE 5-1:
BLOCK DIAGRAM OF
PORT PINS RA<3:0>
Note:
On reset, the TRISA register is set to all inputs.
Data
bus
Q
D
Q
CK
Q
D
Q
CK
Q
D
EN
P
N
WR
PortA
WR
TRISA
Data Latch
TRIS Latch
RD TRISA
RD PORTA
Schmitt
Trigger
input
buffer
V
SS
V
DD
I/O pin
FIGURE 5-2:
BLOCK DIAGRAM OF RA4 PIN
Data
bus
WR
PORTA
WR
TRISA
RD PORTA
Data Latch
TRISA Latch
RD TRISA
Schmitt
Trigger
input
buffer
N
V
SS
I/O pin
(1)
TMR0 clock input
Note 1: I/O pin has protection diodes to V
SS
only.
Q
D
Q
CK
Q
D
Q
CK
EN
Q
D
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PIC16C558/JW 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 13 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)格:SMD/SMT
PIC16C558-04/P 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 13 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)格:SMD/SMT
PIC16C558-04/P 制造商:Microchip Technology Inc 功能描述:IC 8-BIT CMOS MCU
PIC16C558-04/SO 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 13 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)格:SMD/SMT
PIC16C558-04/SS 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 13 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(shí)鐘頻率:50 MHz 程序存儲(chǔ)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(fēng)格:SMD/SMT