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| 型号： | ADM1062ACPZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 18/36页 |
| 文件大小： | 0K |
| 描述： | IC SEQUENCER/SUPERVISOR 40LFCSP |
| 标准包装： | 1 |
| 系列： | Super Sequencer® |
| 类型： | 序列发生器 |
| 监视电压数目： | 10 |
| 输出： | 可编程 |
| 电压 - 阀值： | 可调节/可选择 |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 40-LFCSP-VQ（6x6） |
| 包装： | 托盘 |
| 配用： | EVAL-ADM1062TQEBZ-ND - BOARD EVALUATION FOR ADM1062TQ |
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ADM1062
SEQUENCING ENGINE
OVERVIEW
The ADM1062 sequencing engine (SE) provides the user with
MONITOR
FAULT
STATE
TIMEOUT
powerful and flexible control of sequencing. The SE implements
a state machine control of the PDO outputs, with state changes
conditional on input events. SE programs can enable complex
control of boards, including power-up and power-down sequence
control, fault event handling, and interrupt generation on warnings.
A watchdog function that verifies the continued operation of a
processor clock can be integrated into the SE program. The SE
can also be controlled via the SMBus, giving software or firmware
control of the board sequencing.
The SE state machine comprises 63 state cells. Each state has the
following attributes:
? Monitors signals indicating the status of the 10 input pins,
VP1 to VP4, VH, and VX1 to VX5.
SEQUENCE
Figure 26. State Cell
The ADM1062 offers up to 63 state definitions. The signals
monitored to indicate the status of the input pins are the
outputs of the SFDs.
WARNINGS
The SE also monitors warnings. These warnings can be generated
when the ADC readings violate their limit register value or when
the secondary voltage monitors on VPx and VH are triggered.
?
?
?
?
?
Can be entered from any other state.
Three exit routes move the state machine onto the next state:
sequence detection, fault monitoring, and timeout.
Delay timers for the sequence and timeout blocks can be
programmed independently and changed with each state
change. The range of timeouts is from 0 ms to 400 ms.
Output condition of the 10 PDO pins is defined and fixed
within a state.
Transition from one state to the next is made in less than
20 μs, which is the time needed to download a state
definition from EEPROM to the SE.
The warnings are OR’ed together and are available as a single
warning input to each of the three blocks that enable exiting
a state.
SMBus JUMP (UNCONDITIONAL JUMP)
The SE can be forced to advance to the next state uncondition-
ally. This enables the user to force the SE to advance. Examples
of the use of this feature include moving to a margining state or
debugging a sequence. The SMBus jump or go-to command can
be seen as another input to sequence and timeout blocks to
provide an exit from each state.
Table 7. Sample Sequence State Entries
State
IDLE1
IDLE2
EN3V3
Sequence
If VX1 is low, go to State IDLE2.
If VP1 is okay, go to State EN3V3.
If VP2 is okay, go to State EN2V5.
Timeout
If VP2 is not okay after 10 ms,
Monitor
If VP1 is not okay, go to State IDLE1.
go to State DIS3V3.
DIS3V3
If VX1 is high, go to State IDLE1.
EN2V5
If VP3 is okay, go to State PWRGD.
If VP3 is not okay after 20 ms,
If VP1 or VP2 is not okay, go to State FSEL2.
go to State DIS2V5.
DIS2V5
If VX1 is high, go to State IDLE1.
FSEL1
FSEL2
PWRGD
If VP3 is not okay, go to State DIS2V5.
If VP2 is not okay, go to State DIS3V3.
If VX1 is high, go to State DIS2V5.
Rev. C | Page 18 of 36
If VP1 or VP2 is not okay, go to State FSEL2.
If VP1 is not okay, go to State IDLE1.
If VP1, VP2, or VP3 is not okay, go to State FSEL1.
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