參數(shù)資料
型號: X24012PIG-3
廠商: IC MICROSYSTEMS SDN BHD
元件分類: DRAM
英文描述: Serial E2PROM
中文描述: 128 X 8 I2C/2-WIRE SERIAL EEPROM, PDIP8
封裝: ROHS COMPLIANT, PLASTIC, DIP-8
文件頁數(shù): 7/14頁
文件大小: 284K
代理商: X24012PIG-3
X24012
7
BUS ACTIVITY:
MASTER
SDA LINE
BUS ACTIVITY:
X24012
S
T
A
R
T
SLAVE
ADDRESS
S
A
C
K
S
T
A
R
T
S
WORD
ADDRESS n
A
C
K
SLAVE
ADDRESS
DATA n
A
C
K
S
T
O
P
P
BUS ACTIVITY:
MASTER
SDA LINE
BUS ACTIVITY:
X24012
S
T
A
R
T
SLAVE
ADDRESS
S
S
T
O
P
P
A
C
K
DATA
Current Address Read
Internally the X24012 contains an address counter that
maintains the address of the last word accessed,
incremented by one. Therefore, if the last access (either a
read or write) was to address n, the next read operation
would access data from address n + 1. Upon receipt of the
slave address with R/W set to one, the X24012
issues an acknowledge and transmits the eight bit word
during the next eight clock cycles. The read operation is
terminated by the master; by not responding with an
acknowledge and by issuing a stop condition. Refer to
Figure 7 for the sequence of address, acknowledge and data
transfer.
Random Read
Random read operations allow the master to access any
memory location in a random manner. Prior to issuing
the slave address with the R/W bit set to one, the master must
first perform a “dummy” write operation. The master
issues the start condition, and the slave address followed
by the word address it is to read. After the word
address acknowledge, the master immediately reissues the
start condition and the slave address with the R/W bit
set to one. This will be followed by an acknowledge from the
X24012 and then by the eight bit word. The read
operation is terminated by the master; by not responding with
an acknowledge and by issuing a stop condition.
Refer to Figure 8 for the address, acknowledge and data
transfer sequence.
Figure 7. Current Address Read
3847 FHD F12
Figure 8. Random Read
3847 FHD F13
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