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參數資料
| 型號： | 24LC41IP |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 1K/4K 2.5V Dual Mode, Dual Port I2C⑩ Serial EEPROM |
| 中文描述： | 1K/4K 2.5V的雙模式，雙端口串行EEPROM的I2C⑩ |
| 文件頁數： | 13/18頁 |
| 文件大?。?/td> | 150K |
| 代理商： | 24LC41IP |
2004 Microchip Technology Inc.
DS21140F-page 13
24LC41
8.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 8-1.
TABLE 8-1:
PIN FUNCTION TABLE
8.1
DSDA
This pin is used to transfer addresses and data into and
out of the DDC Monitor Port, when the device is in the
Bidirectional mode. In the Transmit-only mode, which
only allows data to be read from the device, data is also
transferred on the DSDA pin. This pin is an open drain
terminal, therefore the DSDA bus requires a pull-up
resistor to V
CC
(typical 10K
for 100 kHz, 2 K
for
400 kHz).
For normal data transfer in the Bidirectional mode,
DSDA is allowed to change only during DSCL or MSDA
low. Changes during DSCL high are reserved for
indicating the Start and Stop conditions.
8.2
DSCL
This pin is the clock input for the DDC Monitor Port
while in the Bidirectional mode, and is used to synchro-
nize data transfer to and from the device. It is also used
as the signaling input to switch the device from the
Transmit-only mode to the Bidirectional mode. It must
remain high for the chip to continue operation in the
Transmit-only mode.
8.3
VCLK/DWP
This pin is the clock input for the DDC Monitor Port
while in the Transmit-only mode. In the Transmit-only
mode, each bit is clocked out on the rising edge of this
signal. In the Bidirectional mode, a high logic level is
required on this pin to enable write capability.
8.4
MSCL
This pin is the clock input for the Microcontroller Access
Port, and is used to synchronize data transfer to and
from the device.
8.5
MSDA
This pin is used to transfer addresses and data into and
out of the Microcontroller Access Port. This pin is an
open drain terminal, therefore the MSDA bus requires
a pull-up resistor to V
CC
(typical 10K
for 100 kHz,
2K
for 400 kHz).
MSDA is allowed to change only during MSCL low.
Changes during MSCL high are reserved for indicating
the Start and Stop conditions.
8.6
MWP
This pin is used to write-protect the 4K memory array
for the Microcontroller Access Port.
This pin must be connected to either V
SS
or V
CC
.
If tied to Vss, normal memory operation is enabled
(read/write the entire memory).
If tied to V
CC
, Write operations are inhibited. The entire
memory will be write-protected. Read operations are
not affected.
Name
Function
DSCL
Serial Clock for DDC Bidirectional
mode (DDC2)
Serial Address and Data I/O
(DDC Bus)
Serial Clock for DDC Transmit-only
mode (DDC1)/Write-Protect
Serial clock for 4 Kbit MCU port
Serial Address and Data I/O for
4 Kbit MCU port
Hardware write-protect for 4 Kbit
MCU port
Ground
+2.5V to +5.5V power supply
DSDA
VCLK/DWP
MSCL
MSDA
MWP
V
SS
V
CC
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