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参数资料
| 型号： | LMP91000SDX |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO14 |
| 封装： | LLP-14 |
| 文件页数： | 6/24页 |
| 文件大小： | 696K |
| 代理商： | LMP91000SDX |
TIMEOUT FEATURE
The timeout is a safety feature to avoid bus lockup situation.
If SCL is stuck low for a time exceeding t_timeout, the
LMP91000 will automatically reset its I2C interface. Also, in
the case the LMP91000 hangs the SDA for a time exceeding
t_timeout, the LMP91000’s I2C interface will be reset so that
the SDA line will be released. Since the SDA is an open-drain
with an external resistor pull-up, this also avoids high power
consumption when LMP91000 is driving the bus and the SCL
is stopped.
REGISTERS
The registers are used to configure the LMP91000.
If writing to a reserved bit, user must write only 0. Readback value is unspecified and should be discarded.
Register map
Address
Name
Power on default
Access
Lockable?
0x00
STATUS
0x00
Read only
N
0x01
LOCK
0x01
R/W
N
0x02 through 0x09
RESERVED
0x10
TIACN
0x1C
R/W
Y
0x11
REFCN
0x00
R/W
Y
0x12
MODECN
0x00
R/W
N
0x13 through 0xFF
RESERVED
STATUS -- Status Register (address 0x00)
The status bit is an indication of the LMP91000's power-on status. If its readback is “0”, the LMP91000 is not ready to accept other
I2C commands.
Bit
Name
Function
[7:1]
RESERVED
0
STATUS
Status of Device
0 Not Ready (default)
1 Ready
LOCK -- Protection Register (address 0x01)
The lock bit enables and disables the writing of the TIACN and the REFCN registers. In order to change the content of the TIACN
and the REFCN registers the lock bit needs to be set to “0”.
Bit
Name
Function
[7:1]
RESERVED
0
LOCK
Write protection
0 Registers 0x10, 0x11 in write mode
1 Registers 0x10, 0x11 in read only mode (default)
www.national.com
14
LMP91000
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