参数资料
型号: 24LC128T-I/ST14
厂商: Microchip Technology
文件页数: 9/38页
文件大小: 0K
描述: IC EEPROM 128KBIT 400KHZ 14TSSOP
标准包装: 2,500
格式 - 存储器: EEPROMs - 串行
存储器类型: EEPROM
存储容量: 128K (16K x 8)
速度: 400kHz
接口: I²C,2 线串口
电源电压: 2.5 V ~ 5.5 V
工作温度: -40°C ~ 85°C
封装/外壳: 14-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 14-TSSOP
包装: 带卷 (TR)
其它名称: 24LC128TI/ST14
24AA128/24LC128/24FC128
FIGURE 6-1:
BYTE WRITE
Bus Activity
Master
S
T
A
R
T
Control
Byte
Address
High Byte
Address
Low Byte
Data
S
T
O
P
S 1 0 1 0 A A A 0
SDA Line
2 1 0
xx
P
Bus Activity
A
C
K
A
C
K
A
C
K
A
C
K
x = “don’t care” bit
FIGURE 6-2:
PAGE WRITE
Bus Activity
Master
S
T
A
R
T
Control
Byte
Address
High Byte
Address
Low Byte
Data Byte 0
Data Byte 63
S
T
O
P
S 1010 2 1 0 0
SDA Line
A A A
xx
P
Bus Activity
A
C
K
A
C
K
A
C
K
A
C
K
A
C
K
x = “don’t care” bit
7.0 ACKNOWLEDGE POLLING
Since the device 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
command has been issued from the master, the device
initiates the internally timed write cycle. ACK polling
can be initiated immediately. This involves the master
FIGURE 7-1:
ACKNOWLEDGE
POLLING FLOW
Send
Write Command
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, the Start bit and control byte must
be resent. If the cycle is complete, then the device will
return the ACK and the master can then proceed with
the next Read or Write command. See Figure 7-1 for
Send Stop
Condition to
Initiate Write Cycle
Send Start
flow diagram.
Send Control Byte
with R/W = 0
? 2010 Microchip Technology Inc.
Did Device
Acknowledge
(ACK = 0 )?
Yes
Next
Operation
No
DS21191S-page 9
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