參數(shù)資料
型號(hào)： M34C02-W-WMB6TG
廠商： 意法半導(dǎo)體
英文描述： 2 Kbit Serial IC Bus EEPROM for DIMM serial presence detect
中文描述： 2千位串行IC總線的EEPROM內(nèi)存串行存在檢測(cè)
文件頁(yè)數(shù)： 8/31頁(yè)
文件大?。?/td> 162K
代理商： M34C02-W-WMB6TG
Signal description
M34C02-W, M34C02-L, M34C02-R
8/31
2
Signal description
2.1
Serial Clock (SCL)
This input signal is used to strobe all data in and out of the device. In applications where this
signal is used by slave devices to synchronize the bus to a slower clock, the bus master
must have an open drain output, and a pull-up resistor can be connected from Serial Clock
(SCL) to V
CC
. (
Figure 4
indicates how the value of the pull-up resistor can be calculated). In
most applications, though, this method of synchronization is not employed, and so the pull-
up resistor is not necessary, provided that the bus master has a push-pull (rather than open
drain) output.
2.2
Serial Data (SDA)
This bi-directional signal is used to transfer data in or out of the device. It is an open drain
output that may be wire-OR’ed with other open drain or open collector signals on the bus. A
pull up resistor must be connected from Serial Data (SDA) to V
CC
. (
Figure 4
indicates how
the value of the pull-up resistor can be calculated).
2.3
Chip Enable (E0, E1, E2)
These input signals are used to set the value that is to be looked for on the three least
significant bits (b3, b2, b1) of the 7-bit Device Select Code. These inputs must be tied to
V
CC
or V
SS
to establish the Device Select Code.
Figure 3.
Chip Enable input connection
2.4
Write Control (WC)
This input signal is provided for protecting the contents of the whole memory from
inadvertent write operations. Write Control (WC) is used to enable (when driven Low) or
disable (when driven High) write instructions to the entire memory area or to the Protection
Register.
When Write Control (WC) is tied Low or left unconnected, the write protection of the first half
of the memory is determined by the status of the Protection Register.
Ai12819
VCC
M34C02-W
M34C02-L
M34C02-R
Ei
VSS
VCC
M34C02-W
M34C02-L
M34C02-R
Ei
VSS
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