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| 型号： | LTC4245IUHF#PBF |
| 厂商： | Linear Technology |
| 文件页数： | 31/36页 |
| 文件大小： | 431K |
| 描述： | IC CNTRLR HOT SWAP 38-QFN |
| 标准包装： | 52 |
| 类型： | 热交换控制器 |
| 应用： | CompactPCI? |
| 内部开关： | 无 |
| 电源电压： | 3.3V，5V，12V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 38-WFQFN 裸露焊盘 |
| 供应商设备封装： | 38-QFN（5x7） |
| 包装： | 管件 |
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LTC4245
31
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Table 8. ALERT Register B (01h) Read/Write
BIT
NAME
OPERATION
B7
GPIO1 State Change Alert
Enables Alert When GPIO1 Changes State; 1 = Enable Alert, 0 = Disable Alert (Default)
B6
BD_SEL# State Change Alert
Enables Alert When BD_SEL# Changes State; 1 = Enable Alert, 0 = Disable Alert (Default)
B5
FET Short Alert
Enables Alert for FET Short Condition; 1 = Enable Alert, 0 = Disable Alert (Default)
B4
PGI Fault Alert
Enables Alert When a PGI Fault Occurs; 1 = Enable Alert, 0 = Disable Alert (Default)
B3
Alert Present
ALERT# Pin Open-Drain Output State; 1 = Pulls Low, 0 = High Impedance (Default)
B2
Power Bad Alert
Enables Alert When Output Power is Bad; 1 = Enable Alert, 0 = Disable Alert (Default)
B1
Overcurrent Alert
Enables Alert for Overcurrent Condition; 1 = Enable Alert, 0 = Disable Alert (Default)
B0
Undervoltage Alert
Enables Alert for Undervoltage Condition; 1 = Enable Alert, 0 = Disable Alert (Default)
Table 9. CONTROL Register C (02h) Read/Write
BIT
NAME
OPERATION
C7
ADC Free-Run Disable
Disable ADC Free Running Operation to Allow On-Demand Measurement and Writes to ADC
Registers; 1 = Halt ADC Free Running, 0 = ADC Free Running (Default)
C6
Sequencing Enable
Enables Supplies to Turn-On in a Set Sequence
1 = Sequencing Enabled, 0 = Sequencing Disabled (Default)
C5
Mass Write Enable
Enables Mass Write Using Address (0010 111)b
1 = Mass Write Enabled (Default), 0 = Mass Write Disabled
C4
PGI Fault Autoretry
Enables Autoretry After a PGI Fault; 1 = Retry Enabled, 0 = Retry Disabled (Default)
C3
PGI Pin Disable
Enables PGI Pin Going Low During Normal Operation to Shut Off Switches
1 = PGI Pin Disabled (Default), 0 = PGI Pin Enabled
C2
Reserved
Not Used
C1
Overcurrent Autoretry
Enables Autoretry After an Overcurrent Fault; 1 = Retry Enabled, 0 = Retry Disabled (Default)
C0
Undervoltage Autoretry
Enables Autoretry After an Undervoltage Fault; 1 = Retry Enabled (Default), 0 = Retry Disabled
Table 10. ON Register D (03h) Read/Write
BIT
NAME
OPERATION
D7
12V FET On Status
Indicates State of 12V FET. Read Only Bit; 1 = FET On, 0 = FET Off
D6
3.3V FET On Status
Indicates State of 3.3V FET. Read Only Bit; 1 = FET On, 0 = FET Off
D5
5V FET On Status
Indicates State of 5V FET. Read Only Bit; 1 = FET On, 0 = FET Off
D4
12V FET On Status
Indicates State of 12V FET. Read Only Bit; 1 = FET On, 0 = FET Off
D3
12V FET On Control
Turns 12V FET On and Off. Not used if CFG Pin is Not Low. Cannot Write 1 if Bit A1 Set
1 = Turn FET On, 0 = Turn FET Off. Defaults to ON Pin State at End of Debounce Delay
D2
3.3V FET On Control
Turns 3.3V FET On and Off. Cannot Write 1 if Bit A1 Set
1 = Turn FET On, 0 = Turn FET Off. Defaults to ON Pin State at End of Debounce Delay
D1
5V FET On Control
Turns 5V FET On and Off. Cannot Write 1 if Bit A1 Set
1 = Turn FET On, 0 = Turn FET Off. Defaults to ON Pin State at End of Debounce Delay
D0
12V FET On Control
Turns 12V FET On and Off. Also Turns 12V FET On and Off if CFG Pin is Not Low. Cannot Write 1
if Bit A1 Set
1 = Turn FET On, 0 = Turn FET Off. Defaults to ON Pin State at End of Debounce Delay
APPLICATIO S I FOR ATIO
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