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| 型号： | AT73C224-A |
| 厂商： | Atmel |
| 文件页数： | 15/75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
The selection between SPI versus TWI is performed once, each time the start-up sequence is
executed. A timing diagram of the interface selection is shown in Figure 5-6. Care must be taken
to leave enough time between the activation of the pullup and the moment when D4 is sampled
back. This time is necessary to load the capacitance of the net layout where D4 is connected
through the pull-up resistor (100 k ? typ.). This time is in the order of magnitude of 1 μs (10 pF *
100 k ? ), i.e. only a few cycles of the 900 kHz oscillator are needed.
Figure 5-6.
Dynamic Mode Interface Selection
Table 5-2.
Digital Interface Selection
D4
D4 pull-up control signal
dynamic
D4
D4 pull-up control signal
dynamic
SCS = Serial Chip Select
Hz
SPI selected, D4 => SCS
TWI selected
Digital Signal
SPI Selection
TWI Selection
Interface
D1
D2
D3
D4 (1)
Pad
I
BIDIR
I
I
Signal
SCK
SDO
SDI
SCS
Direction
In
Out
In
In
Signal
TWCK
TWD
Select the 7-bit
fixed address
grounded
Direction
In
I/O
In
-
Note:
5.3.2.1
1. On D4, I = Input pad with controllable pull-up resistor.
SPI Operation
When SPI mode is selected, the control interface to the AT73C224-x chip is a 4-wire interface
modeled after commonly available microcontroller and serial-peripheral devices. The interface
consists of a serial clock (SCK), chip select (SCS), serial data input (SDI) and serial data output
(SDO). Data is transferred one byte at a time with each register access consisting of a pair of
byte transfers. Figure 5-7 below illustrates read and write operations in SPI mode.
15
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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