參數(shù)資料
型號： TPS2383
廠商： Texas Instruments, Inc.
英文描述： Power Over Ethernet Switch Side Manager
中文描述： 以太網(wǎng)供電開關(guān)側(cè)管理器
文件頁數(shù)： 18/27頁
文件大小： 394K
代理商： TPS2383
SLUS559B APRIL 2003 REVISED JULY 2004
18
www.ti.com
FUNCTIONAL DESCRIPTION
Table 5.
Port Status
Read Register, Register Address =
001
, Port Address =
001111
(
Port 2 through Port 8)
BIT
FUNCTION
STATE
PRESET
STATE
D7
Port service
0
= Port not selected
1
= Port selected and being serviced
0
D6
Spare
0
D5
Spare
1
D4
Spare
1
D3
Spare
1
D2
Fault status (MSB)
000
= Reset state
001
= UV/OV fault/spike
010
= UV/OV spike
011
= Peak overcurrent fault
100
= Overload fault
101
= Discovery Fail
110
= Load disconnect
111
= Reserved for future
D1
Fault status
000
D0
Fault status (LSB)
Port Control Registers
The Port Control registers’ (address 010) bit maps are shown in the following tables. These registers contain
port-specific control bits, accessible over the I
2
C bus, for setting the port powered and port LED modes. To
conserve hardware resources, some common control functions have been assigned to available bit locations
within these registers. To clarify usage, these common functions are identified as such in the table RANK
column.
Table 6.
Port Control
Write Register, Register Address =
010
, Port Address =
000
(Port 1 Register)
BIT
FUNCTION
RANK
STATE
PRESET
STATE
D7
Port fault disable
Port
0
= Normal mode
1
= Disable the port overload and UV/OV timers
0
D6
POR disable
Common
0
= Normal POR timing
1
= Force POR to a non-reset state
0
D5
Software RESET
Common
0
= Normal operation
1
= Reset all circuits and start a device POR timing cycle
0
D4
LED blink enable
Port
0
= LED is continuous
1
= Blink the enabled LED at a fast-blink rate. Note fast-blink rate (in
milliseconds) equivalent to 0.00013 x TPS2383 clock (CLK). This could be
as fast as 65 ms for a 500-kHz, TPS2383 clock.
0
D3
LED low-side enable
Port
1
= Enable the low-side FET and drive the LED pin low
1
= Enable the high-side FET and drive the LED pin to V5
0
D2
LED high-side enable
Port
0
D1
Enable modes
Port
00
= Port OFF or disable
01
= Discovery classification power on sequence
10
= Sample powered-mode current
11
= Power-down an active port
0
D0
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