Use TF_PR[3:0] to set the nominal value for tDISC according to the following formula: " />
參數(shù)資料
型號(hào): MAX5945CAX+
廠商: Maxim Integrated Products
文件頁(yè)數(shù): 27/44頁(yè)
文件大?。?/td> 0K
描述: IC NETWORK PWR CTRL 36-SSOP
產(chǎn)品培訓(xùn)模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝: 30
控制器類型: 網(wǎng)絡(luò)電源控制器
接口: I²C
電源電壓: 3.3V
電流 - 電源: 4.2mA
工作溫度: 0°C ~ 70°C
安裝類型: 表面貼裝
封裝/外殼: 36-BSOP(0.295",7.50mm 寬)
供應(yīng)商設(shè)備封裝: 36-SSOP
包裝: 管件
Use TF_PR[3:0] to set the nominal value for tDISC
according to the following formula:
tDISC nominal = 238ms + 16ms x N
where N is the decimal value of the binary words
TF_PR[3:0].
A reset sets R27h = 47h, which sets tDISC nominal =
350ms as shown in the Electrical Characteristics. Use
R27h in conjunction with the two TDISC[1:0] bits in reg-
ister R16h to program the values of tDISC from 60ms to
almost 340ms with a 16ms resolution.
Example: Set TD_PR[3:0] = 1111b, TDISC[1:0] = 11b
Then:
tDISC = 2 x tDISC nominal
= 2 x (238ms + 16ms x 15)
= 956ms
Note: The programmed value has the same percent-
age tolerance as the value specified in the Electrical
Characteristics.
MAX5945
Quad Network Power Controller
for Power-Over-LAN
______________________________________________________________________________________
33
ADDRESS = 23h
SYMBOL
BIT
R/W
DESCRIPTION
7
R/W
IGATE[2]
6
R/W
IGATE[1]
IGATE
5
R/W
IGATE[0]
DET_BYP
4
R/W
Detect bypass protection in AUTO mode
OSCF_RS
3
R/W
OSC_FAIL Reset Bit
2
R/W
AC_TH[2]
1
R/W
AC_TH[1]
AC_TH
0
R/W
AC_TH[0]
Table 27. Program Register 1
ADDRESS = 27h
SYMBOL
BIT
R/W
DESCRIPTION
7
R
IMAX[3]. VSU_LIM programming bit 3.
6
R
IMAX[2]. VSU_LIM programming bit 2.
5
R
IMAX[1]. VSU_LIM programming bit 1.
IMAX
4
R
IMAX[0]. VSU_LIM programming bit 0.
3
R
TD_PR[3]. tDISC nominal programming bit 3.
2
R
TD_PR [2]. tDISC nominal programming bit 2.
1
R
TD_PR [1]. tDISC nominal programming bit 1.
TD_PR
0
R
TD_PR [0]. tDISC nominal programming bit 0.
Table 28. Program Register 2
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