参数资料
型号: PIC12C672T-10I/MF
厂商: Microchip Technology
文件页数: 59/129页
文件大小: 0K
描述: IC MCU OTP 2KX14 W/AD 8-DFN
标准包装: 3,300
系列: PIC® 12C
核心处理器: PIC
芯体尺寸: 8-位
速度: 10MHz
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: -40°C ~ 85°C
封装/外壳: 8-VDFN 裸露焊盘
包装: 带卷 (TR)
配用: AC164324-ND - MODULE SKT FOR MPLAB 8DFN/16QFN
XLT08DFN2-ND - SOCKET TRANSITION ICE 14DIP/8DFN
XLT08DFN-ND - SOCKET TRANSITION ICE 8DFN
AC164032-ND - ADAPTER PICSTART PLUS 8DFN/DIP
AC124001-ND - MODULE SKT PROMATEII 8DIP/SOIC
1999 Microchip Technology Inc.
DS30561B-page 35
PIC12C67X
FIGURE 6-3:
DATA TRANSFER SEQUENCE ON THE SERIAL BUS
FIGURE 6-4:
ACKNOWLEDGE TIMING
6.2
Device Addressing
After generating a START condition, the processor
transmits a control byte consisting of a EEPROM
address and a Read/Write bit that indicates what type
of operation is to be performed. The EEPROM address
consists of a 4-bit device code (1010) followed by three
don’t care bits.
The last bit of the control byte determines the operation
to be performed. When set to a one, a read operation
is selected, and when set to a zero, a write operation is
selected (Figure 6-5). The bus is monitored for its cor-
responding EEPROM address all the time. It generates
an acknowledge bit if the EEPROM address was true
and it is not in a programming mode.
FIGURE 6-5:
CONTROL BYTE FORMAT
(A)
(B)
(C)
(D)
(A)
(C)
SCL
SDA
START
CONDITION
ADDRESS OR
ACKNOWLEDGE
VALID
DATA
ALLOWED
TO CHANGE
STOP
CONDITION
SCL
9
8
7
6
5
4
3
2
1
123
Transmitter must release the SDA line at this point
allowing the Receiver to pull the SDA line low to
acknowledge the previous eight bits of data.
Receiver must release the SDA line at this
point so the Transmitter can continue
sending data.
Data from transmitter
SDA
Acknowledge
Bit
10
1
0
X
SACK
R/W
Device Select
Bits
Don’t Care
Bits
EEPROM Address
Acknowledge Condition
Start Condition
Read/Write Bit
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