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参数资料
型号： PIC14000T-04I/SO
厂商： Microchip Technology
文件页数： 95/153页
文件大小： 0K
描述： IC MCU OTP 4KX14 A/D 28SOIC
产品培训模块： Asynchronous Stimulus
标准包装： 1,600
系列： PIC® 14
核心处理器： PIC
芯体尺寸： 8-位
速度： 4MHz
连通性： I²C
外围设备： POR，温度传感器，WDT
输入/输出数： 20
程序存储器容量： 7KB（4K x 14）
程序存储器类型： OTP
RAM 容量： 192 x 8
电压 - 电源 (Vcc/Vdd)： 2.7 V ~ 6 V
数据转换器： 斜率 A/D
振荡器型： 内部
工作温度： -40°C ~ 85°C
封装/外壳： 28-SOIC（0.295"，7.50mm 宽）
包装： 带卷 (TR)
PIC14000
DS40122B-page 46
Preliminary
1996 Microchip Technology Inc.
When a master does not wish to relinquish the bus (by
generating a STOP condition), a repeated START (Sr)
must be generated. This condition is identical to the
START (SDA goes high-to-low while SCL is high), but
occurs after a data transfer acknowledge pulse (not the
bus-free state). This allows a master to send
“commands” to the slave and then receive the
requested information or to address a different slave
device. This sequence is shown in Figure 7-10.
FIGURE 7-8:
MASTER - TRANSMITTER SEQUENCE
FIGURE 7-9:
MASTER - RECEIVER SEQUENCE
FIGURE 7-10: COMBINED FORMAT
For 7-bit address:
S Slave Address R/W A DATA A DATA A/A
P
"0" (write)
data transferred
(n bytes - acknowledge)
A master transmitter addresses a slave receiver with a
7-bit address. The transfer direction is not changed.
For 10-bit address:
S Slave Address
first 7 bits
R/W A1 Slave Address
second byte
A2
(write)
A master transmitter addresses a slave receiver with a
10-bit address.
From master to slave
From slave to master
A = acknowledge (SDA low)
A = not acknowledge (SDA high)
S = START condition
P = STOP condition
Data A
Data
P
A/A
For 7-bit address:
S Slave Address R/W A DATA A DATA
A
P
(read)
data transferred
(n bytes - acknowledge)
A master reads a slave immediately after the first byte.
For 10-bit address:
S Slave Address
first 7 bits
R/W A1 Slave Address
second byte
A2
(write)
A master transmitter addresses a slave receiver with a
10-bit address.
From master to slave
From slave to master
A = acknowledge (SDA low)
A = not acknowledge (SDA high)
S = START condition
P = STOP condition
Sr Slave Address
first 7 bits
R/W A3 Data A
Data
P
A
(read)
S Slave Address R/W A DATA A/A
(read or write)
(n bytes + acknowledge)
Transfer direction of data and acknowledgement bits depends on R/W bits.
Combined Format:
S Slave Address
first 7 bits
R/W A Slave Address
second byte
A
(write)
Combined format -
From master to slave
From slave to master
A = acknowledge (SDA low)
A = not acknowledge (SDA high)
S = START condition
P = STOP condition
Sr Slave Address
first 7 bits
R/W A Data A
Data
P
A
(read)
Sr Slave Address R/W A DATA A/A P
Sr = repeated
START condition
Direction of transfer
may change at this point
Data A
Data A/A
A master addresses a slave with a 10-bit address, then transmits
data to this slave and reads data from this slave.
(read)
(write)
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PIC14000T-20I/SO 功能描述:8位微控制器 -MCU 7KB 192 RAM 20 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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