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| 型号： | AT73C224-A |
| 厂商： | Atmel |
| 文件页数： | 13/75页 |
| 文件大小： | 0K |
| 描述： | IC PWR MGMT ANALOG PMAAC 32QFN |
| 标准包装： | 490 |
| 应用： | 手持/移动设备 |
| 电源电压： | 2.8 V ~ 5.25 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 32-VFQFN 裸露焊盘 |
| 供应商设备封装： | 32-QFN（5x5） |
| 包装： | 托盘 |
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AT73C224
5.3
5.3.1
Digital Control and Protocol
between SPI or TWI is done at start-up via the D4 pin (see Section 5.3.2 on page 14 ).
Static Mode
When the AT73C224-x is established in Static Mode, the digital interface signals, D1 to D4,
directly drive the enable of the four supplies. During start-up, these enable signals are driven by
the internal state machine. To ensure a safe transition between the start-up state and the estab-
lished state, a handshake protocol must be respected. This transition period is especially
important in a microcontroller environment, as the microcontroller controlling the D1-D4 signals
may require an unknown period of time to actually drive these pins.
In Static Mode, the ITB/RDY pin is configured as an input with controllable pull-up resistor. When
the internal state machine completes the supply start-up, it latches the value of ITB/RDY and
then sets the POK signal to 1. This means that start-up is accomplished. The state machine then
checks for changes on ITB/RDY. If no changes are detected, the control of the four supply chan-
nels remains with the state machine. If a change is detected the internal pullup is disconnected
and the control is passed on to D1-D4, with the assignment shown in Table 5-2 below.
Table 5-1.
D1-D4 Signal Assignment
Digital Interface Signal
D1
D2
D3
D4
Supply Enable
Enables BOOST1
Enables BUCK2
Enables LDO3
Enables LDO4
The illustrations in Figure 5-3 , Figure 5-5 and Figure 5-5 represent possible static mode
scenarios.
Figure 5-3.
Fully Static Mode
D1
D2
D3
D4
0 or 1
ITB/RDY
POK
Open or 1
Power OK
Since ITB/RDY is 1 or open (weak internal pullup), the state of each supply channel is deter-
mined by the internal state machine (Automatic Start-up sequence and default values for the
three power supplies). In this configuration, the 4th power supply is off and can not be used. D1-
D4 is not considered, but must be valid. The POK signal can be used as a global system reset.
13
6266A–PMAAC–08-Sep-08
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AT73C224-B | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Power Management and Analog Companions (PMAAC) |
| AT73C224-C | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Power Management and Analog Companions (PMAAC) |
| AT73C224-D | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Power Management and Analog Companions (PMAAC) |
| AT73C224-E | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Power Management and Analog Companions (PMAAC) |
| AT73C224-EK1 | 功能描述:电源管理IC开发工具 AT73C224 EVALUATION KIT RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
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