參數(shù)資料
型號： PIC12CE674-10I/P
廠商： Microchip Technology
文件頁數(shù)： 60/129頁
文件大?。?/td> 0K
描述： IC MCU OTP 2KX14 A/D&EE 8DIP
產(chǎn)品培訓(xùn)模塊： Asynchronous Stimulus
標準包裝： 60
系列： PIC® 12C
核心處理器： PIC
芯體尺寸： 8-位
速度： 10MHz
外圍設(shè)備： POR，WDT
輸入/輸出數(shù)： 5
程序存儲器容量： 3.5KB（2K x 14）
程序存儲器類型： OTP
EEPROM 大小： 16 x 8
RAM 容量： 128 x 8
電壓 - 電源 (Vcc/Vdd)： 3 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 4x8b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 8-DIP（0.300"，7.62mm）
包裝： 管件
PIC12C67X
DS30561B-page 36
1999 Microchip Technology Inc.
6.3
Write Operations
6.3.1
BYTE WRITE
Following the start signal from the processor, the
device code (4 bits), the don’t care bits (3 bits), and the
R/W bit (which is a logic low) are placed onto the bus
by the processor. This indicates to the addressed
EEPROM that a byte with a word address will follow
after it has generated an acknowledge bit during the
ninth clock cycle. Therefore, the next byte transmitted
by the processor is the word address and will be written
into the address pointer. Only the lower four address
bits are used by the device, and the upper four bits are
don’t cares. If the address byte is acknowledged, the
processor will then transmit the data word to be written
into the addressed memory location. The memory
acknowledges again and the processor generates a
stop condition. This initiates the internal write cycle,
and during this time will not generate acknowledge sig-
nals. After a byte write command, the internal address
counter will not be incremented and will point to the
same address location that was just written. If a stop bit
sequence is transmitted to the device at any point in the
write command sequence before the entire sequence
is complete, then the command will abort and no data
will be written. If more than 8 data bits are transmitted
before the stop bit sequence is sent, then the device will
clear the previously loaded byte and begin loading the
data buffer again. If more than one data byte is trans-
mitted to the device and a stop bit is sent before a full
eight data bits have been transmitted, then the write
command will abort and no data will be written. The
EEPROM memory employs a VCC threshold detector
circuit, which disables the internal erase/write logic if
the VCC is below minimum VDD. Byte write operations
must be preceded and immediately followed by a bus
not busy bus cycle where both SDA and SCL are held
high. (See Figure 6-7 for Byte Write operation.)
6.4
Acknowledge Polling
Since the EEPROM will not acknowledge during a write
cycle, this can be used to determine when the cycle is
complete (this feature can be used to maximize bus
throughput). Once the stop condition for a write com-
mand has been issued from the processor, the device
initiates the internally timed write cycle. ACK polling
can be initiated immediately. This involves the proces-
sor sending a start condition followed by the control
byte for a write command (R/W = 0). If the device is still
busy with the write cycle, then no ACK will be returned.
If no ACK is returned, then the start bit and control byte
must be re-sent. If the cycle is complete, then the
device will return the ACK and the processor can then
proceed with the next read or write command. (See
Figure 6-6 for flow diagram.)
FIGURE 6-6:
ACKNOWLEDGE POLLING
FLOW
FIGURE 6-7:
BYTE WRITE
Send
Write Command
Send Stop
Condition to
Initiate Write Cycle
Send Start
Send Control Byte
with R/W = 0
Did EEPROM
Acknowledge
(ACK = 0)?
Next
Operation
NO
YES
S
P
SDA LINE
S
T
A
R
T
S
T
O
P
CONTROL
BYTE
WORD
ADDRESS
DATA
A
C
K
A
C
K
A
C
K
10
X
10
X
XX
X = Don’t Care Bit
XX
X
0
ACTIVITY
相關(guān)PDF資料
PDF描述
VE-B3B-CU-F2 CONVERTER MOD DC/DC 95V 200W
VE-2TV-IY-B1 CONVERTER MOD DC/DC 5.8V 50W
PIC12CE673-10I/P IC MCU OTP 1KX14 A/D&EE 8DIP
VE-2TR-IY-B1 CONVERTER MOD DC/DC 7.5V 50W
VE-B34-CU-F4 CONVERTER MOD DC/DC 48V 200W
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PIC12CE67X 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:8-Pin, 8-Bit CMOS Microcontroller with A/D Converter and EEPROM Data Memory
PIC12CR509 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:8-Pin, 8-Bit CMOS Microcontrollers
PIC12CR509A 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:8-Pin, 8-Bit CMOS Microcontrollers
PIC12CR509A-04/EJW 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:8-Pin, 8-Bit CMOS Microcontrollers
PIC12CR509A-04/EP 制造商:MICROCHIP 制造商全稱:Microchip Technology 功能描述:8-Pin, 8-Bit CMOS Microcontrollers
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*