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参数资料
型号： PIC16C72-10E/SO
厂商： Microchip Technology
文件页数： 55/114页
文件大小： 0K
描述： IC MCU OTP 2KX14 A/D PWM 28SOIC
标准包装： 27
系列： PIC® 16C
核心处理器： PIC
芯体尺寸： 8-位
速度： 10MHz
连通性： I²C，SPI
外围设备： 欠压检测/复位，POR，PWM，WDT
输入/输出数： 22
程序存储器容量： 3.5KB（2K x 14）
程序存储器类型： OTP
RAM 容量： 128 x 8
电压 - 电源 (Vcc/Vdd)： 4 V ~ 6 V
数据转换器： A/D 5x8b
振荡器型： 外部
工作温度： -40°C ~ 125°C
封装/外壳： 28-SOIC（0.295"，7.50mm 宽）
包装： 管件
1997 Microchip Technology Inc.
DS30390E-page 45
PIC16C7X
5.2
PORTB and TRISB Registers
PORTB is an 8-bit wide bi-directional port. The corre-
sponding data direction register is TRISB. Setting a bit
in the TRISB register puts the corresponding output
driver in a hi-impedance input mode. Clearing a bit in
the TRISB register puts the contents of the output latch
on the selected pin(s).
EXAMPLE 5-2:
INITIALIZING PORTB
BCF
STATUS, RP0
;
CLRF
PORTB
; Initialize PORTB by
; clearing output
; data latches
BSF
STATUS, RP0
; Select Bank 1
MOVLW
0xCF
; Value used to
; initialize data
; direction
MOVWF
TRISB
; Set RB<3:0> as inputs
; RB<5:4> as outputs
; RB<7:6> as inputs
Each of the PORTB pins has a weak internal pull-up. A
single control bit can turn on all the pull-ups. This is
performed by clearing bit RBPU (OPTION<7>). The
weak pull-up is automatically turned off when the port
pin is congured as an output. The pull-ups are dis-
abled on a Power-on Reset.
FIGURE 5-3:
BLOCK DIAGRAM OF
RB3:RB0 PINS
Applicable Devices
72 73 73A 74 74A 76 77
Data Latch
RBPU(2)
P
VDD
Q
D
CK
Q
D
CK
QD
EN
Data bus
WR Port
WR TRIS
RD TRIS
RD Port
weak
pull-up
RD Port
RB0/INT
I/O
pin(1)
TTL
Input
Buffer
Note 1: I/O pins have diode protection to VDD and VSS.
2: To enable weak pull-ups, set the appropriate TRIS bit(s)
and clear the RBPU bit (OPTION<7>).
Schmitt Trigger
Buffer
TRIS Latch
Four of PORTB’s pins, RB7:RB4, have an interrupt on
change feature. Only pins congured as inputs can
cause this interrupt to occur (i.e. any RB7:RB4 pin con-
gured as an output is excluded from the interrupt on
change comparison). The input pins (of RB7:RB4) are
compared with the old value latched on the last read of
PORTB. The “mismatch” outputs of RB7:RB4 are
OR’ed together to generate the RB Port Change Inter-
rupt with ag bit RBIF (INTCON<0>).
This interrupt can wake the device from SLEEP. The
user, in the interrupt service routine, can clear the inter-
rupt in the following manner:
a)
Any read or write of PORTB. This will end the
mismatch condition.
b)
Clear ag bit RBIF.
A mismatch condition will continue to set ag bit RBIF.
Reading PORTB will end the mismatch condition, and
allow ag bit RBIF to be cleared.
This interrupt on mismatch feature, together with soft-
ware congurable pull-ups on these four pins allow
easy interface to a keypad and make it possible for
wake-up on key-depression. Refer to the Embedded
Control Handbook,
"Implementing Wake-Up on Key
Stroke" (AN552).
The interrupt on change feature is recommended for
wake-up on key depression operation and operations
where PORTB is only used for the interrupt on change
feature. Polling of PORTB is not recommended while
using the interrupt on change feature.
Note:
For the PIC16C73/74, if a change on the
I/O pin should occur when the read opera-
tion is being executed (start of the Q2
cycle), then interrupt ag bit RBIF may not
get set.
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相关代理商/技术参数
参数描述
PIC16C72-10I/SO 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 22 I/O 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
PIC16C72-10I/SP 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 22 I/O 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
PIC16C72-10I/SS 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 22 I/O 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
PIC16C72-20/SO 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 22 I/O 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
PIC16C72-20/SP 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 22 I/O 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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