FN7432.7 October 26, 2011 Enabling Outputs The output enable control word is used to enable individual outputs. There are 32 channels to config" />
參數(shù)資料
型號(hào)： ISL59532IKEZ
廠商： Intersil
文件頁(yè)數(shù)： 14/25頁(yè)
文件大?。?/td> 0K
描述： IC CROSSPOINT SW 32X32 356BGA
標(biāo)準(zhǔn)包裝： 40
功能： 視頻交叉點(diǎn)開(kāi)關(guān)
電路： 1 x 32:32
電壓電源： 單電源
電壓 - 電源，單路/雙路(±)： 4.5 V ~ 5.5 V
電流 - 電源： 640mA
工作溫度： -40°C ~ 85°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 356-BBGA 裸露焊盤(pán)
供應(yīng)商設(shè)備封裝： 356-HPBGA（27x27）
包裝： 托盤(pán)
產(chǎn)品目錄頁(yè)面： 1247 (CN2011-ZH PDF)
21
FN7432.7
October 26, 2011
Enabling Outputs
The output enable control word is used to enable individual outputs. There are 32 channels to configure, so this is accomplished by
writing 4 serial words, each controlling a bank of eight outputs at a time. The bank is selected by bits B9 and B8. The output enable
control word format is:
Setting the ON bit = 0 tri-states the output. Setting the ON bit = 1 enables the output if the Global Output Enable bit is also set (the
individual output enable bits are ANDed with the Global Output Enable bit before they are sent to the output stage).
Setting the Gain
The gain of each output may be set to x1 or x2 using the Gain Set word. It is in the same format as the output enable control word:
Set GN = 0 for a gain of x1 or 1 for a gain of x2.
Broadcast Mode
The Broadcast Mode routes one input to all 32 outputs. The broadcast control word is:
I4:I0 form the 5-bit word indicating the input channel (0 to 31) to be sent to all 32 outputs. Set the Enable Broadcast bit (B0) = 1 to
enable Broadcast Mode, or to 0 to disable Broadcast Mode. When Broadcast Mode is disabled, the previous channel assignments
are restored.
Control Word
The ISL59532’s power-on reset disables all outputs and places the part in a low-power standby mode. To enable the device, the
following control word should be sent:
The Clamp bit enables the input clamp function, forcing the AC-coupled signal’s most negative point to be equal to VREF.
Note: The Clamp bit turns the DC-Restore clamp function on or off for all channels - there is no DC-Restore on/off control for
individual channels. The DC-Restore function only works with signals with sync tips (composite video). Signals that do not have
sync tips (the Chroma/C signal in s-video and the Pb, Pr signals in Component video), will be severely distorted if run through a
DC-Restore/clamp function.
TABLE 4. OUTPUT ENABLE FORMAT
B15 B14 B13 B12 B11 B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
00
10
00
00
O7
O6
O5
O4
O3
O2
O1
O0
00
10
00
01
O15
O14
O13
O12
O11
O10
O9
O8
00
10
00
10
O23
O22
O21
O20
O19
O18
O17
O16
00
10
00
11
O31
O30
O29
O28
O27
O26
O25
O24
TABLE 5. GAIN SET FORMAT
B15 B14 B13 B12 B11 B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
01
000
0
00
G7
G6
G5
G4
G3
G2
G1
G0
01
000
0
01
G15
G14
G13
G12
G11
G10
G9
G8
01
000
0
10
G23
G22
G21
G20
G19
G18
G17
G16
01
000
0
11
G31
G30
G29
G28
G27
G26
G25
G24
TABLE 6. BROADCAST FORMAT
B15
B14
B13
B12
B11
B10
B9
B8
B7
B6
B5
B4
B3
B2
B1
B0
01
1
I4
I3
I2
I1
I0
0
Enable Broadcast
0: Broadcast Mode Disabled
1: Broadcast Mode Enabled
TABLE 7. CONTROL WORD FORMAT
B15 B14 B13 B12 B11 B10
B9
B8 B7 B6 B5 B4 B3 B2
B1
B0
111
0
Clamp
0: Clamp Disabled
1: Clamp Enabled
0
000
0
Power
0: Standby
1: Operational
Global Output Enable
0: All outputs tristated
1: Individual Output Enable bits control outputs
ISL59532
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