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参数资料
| 型号： | PIC12C672-04/SM |
| 厂商： | Microchip Technology |
| 文件页数： | 61/129页 |
| 文件大小： | 0K |
| 描述： | IC MCU OTP 2KX14 A/D 8-SOIJ |
| 产品培训模块： | Asynchronous Stimulus 8-bit PIC® Microcontroller Portfolio |
| 标准包装： | 90 |
| 系列： | PIC® 12C |
| 核心处理器： | PIC |
| 芯体尺寸： | 8-位 |
| 速度： | 4MHz |
| 外围设备： | POR，WDT |
| 输入/输出数： | 5 |
| 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)： | 3 V ~ 5.5 V |
| 数据转换器： | A/D 4x8b |
| 振荡器型： | 内部 |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 8-SOIC（0.209"，5.30mm 宽） |
| 包装： | 管件 |
| 配用： | XLT08SO-1-ND - SOCKET TRANSITION 8SOIC 150/208 AC164312-ND - MODULE SKT FOR PM3 16SOIC ISPICR1-ND - ADAPTER IN-CIRCUIT PROGRAMMING 309-1048-ND - ADAPTER 8-SOIC TO 8-DIP 309-1047-ND - ADAPTER 8-SOIC TO 8-DIP AC124001-ND - MODULE SKT PROMATEII 8DIP/SOIC |
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1999 Microchip Technology Inc.
DS30561B-page 37
PIC12C67X
6.5
Read Operations
Read operations are initiated in the same way as write
operations with the exception that the R/W bit of the
EEPROM address is set to one. There are three basic
types of read operations; current address read, random
read and sequential read.
6.5.1
CURRENT ADDRESS READ
The EEPROM contains an address counter that main-
tains the address of the last word accessed, internally
incremented by one. Therefore, if the previous read
access was to address n, the next current address read
operation would access data from address n + 1. Upon
receipt of the EEPROM address with the R/W bit set to
one, the EEPROM issues an acknowledge and trans-
mits the 8-bit data word. The processor will not
acknowledge the transfer, but does generate a stop
condition and the EEPROM discontinues transmission
6.5.2
RANDOM READ
Random read operations allow the processor to access
any memory location in a random manner. To perform
this type of read operation, first the word address must
be set. This is done by sending the word address to the
EEPROM as part of a write operation. After the word
address is sent, the processor generates a start condi-
tion following the acknowledge. This terminates the
write operation, but not before the internal address
pointer is set. Then the processor issues the control
byte again, but with the R/W bit set to a one. The
EEPROM will then issue an acknowledge and trans-
mits the 8-bit data word. The processor will not
acknowledge the transfer, but does generate a stop
condition and the EEPROM discontinues transmission
(Figure 6-9). After this command, the internal address
counter will point to the address location following the
one that was just read.
6.5.3
SEQUENTIAL READ
Sequential reads are initiated in the same way as a ran-
dom read, except that after the device transmits the first
data byte, the processor issues an acknowledge as
opposed to a stop condition in a random read. This
directs the EEPROM to transmit the next sequentially
addressed 8-bit word (Figure 6-10).
To provide sequential reads, the EEPROM contains an
internal address pointer, which is incremented by one
at the completion of each read operation. This address
pointer allows the entire memory contents to be serially
read during one operation.
FIGURE 6-8:
CURRENT ADDRESS READ
FIGURE 6-9:
RANDOM READ
FIGURE 6-10: SEQUENTIAL READ
SDA LINE
P
S
T
O
P
CONTROL
BYTE
S
T
A
R
T
DATA
A
C
K
N
O
A
C
K
11
00 X X X 1
X = Don’t Care Bit
ACTIVITY
P
SDA LINE
S
T
A
R
T
S
T
O
P
CONTROL
BYTE
A
C
K
WORD
ADDRESS (n)
CONTROL
BYTE
S
T
A
R
T
DATA (n)
A
C
K
A
C
K
N
O
A
C
K
XX X X
S1
1
00 X X X 0
S1
1
00 X X X 1
X = Don’t Care Bit
ACTIVITY
P
SDA LINE
S
T
O
P
CONTROL
BYTE
A
C
K
N
O
A
C
K
DATA n
DATA n + 1
DATA n + 2
DATA n + X
A
C
K
A
C
K
A
C
K
ACTIVITY
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PIC12C672-10 | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:8-Pin, 8-Bit CMOS Microcontroller with A/D Converter |
| PIC12C672-10/JM | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:8-Pin, 8-Bit CMOS Microcontroller with A/D Converter |
| PIC12C672-10/JW | 制造商:未知厂家 制造商全称:未知厂家 功能描述:MICROCONTROLLER|8-BIT|PIC CPU|CMOS|DIP|8PIN|CERAMIC |
| PIC12C672-10/P | 功能描述:8位微控制器 -MCU 3.5KB 128 RAM 6 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 |
| PIC12C672-10/P | 制造商:Microchip Technology Inc 功能描述:IC 8BIT CMOS MCU 12C672 DIP8 |
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