参数资料
型号: PIC16F1527T-I/MR
厂商: Microchip Technology
文件页数: 48/94页
文件大小: 0K
描述: MCU 28KB FLASH 1536B RAM 64-QFN
标准包装: 3,300
系列: PIC® XLP™ 16F
核心处理器: PIC
芯体尺寸: 8-位
速度: 20MHz
连通性: I²C,LIN,SPI,UART/USART
外围设备: 欠压检测/复位,POR,PWM,WDT
输入/输出数: 54
程序存储器容量: 28KB(16K x 14)
程序存储器类型: 闪存
RAM 容量: 1.5K x 8
电压 - 电源 (Vcc/Vdd): 2.3 V ~ 5.5 V
数据转换器: A/D 30x10b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 64-VFQFN 裸露焊盘
包装: 带卷 (TR)
213
7810C–AVR–10/12
Atmel ATmega328P [Preliminary]
21.5
Overview of the TWI Module
The TWI module is comprised of several submodules, as shown in Figure 21-9. All registers
drawn in a thick line are accessible through the AVR data bus.
Figure 21-9. Overview of the TWI Module
21.5.1
SCL and SDA Pins
These pins interface the AVR TWI with the rest of the MCU system. The output drivers contain a
slew-rate limiter in order to conform to the TWI specification. The input stages contain a spike
suppression unit removing spikes shorter than 50 ns. Note that the internal pull-ups in the AVR
pads can be enabled by setting the PORT bits corresponding to the SCL and SDA pins, as
explained in the I/O Port section. The internal pull-ups can in some systems eliminate the need
for external ones.
TWI
Unit
Address Register
(TWAR)
Address Match Unit
Address Comparator
Control Unit
Control Register
(TWCR)
Status Register
(TWSR)
State Machine and
Status control
SCL
Slew-rate
Control
Spike
Filter
SDA
Slew-rate
Control
Spike
Filter
Bit Rate Generator
Bit Rate Register
(TWBR)
Prescaler
Bus Interface Unit
START / STOP
Control
Arbitration detection
Ack
Spike Suppression
Address/Data Shift
Register (TWDR)
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