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參數(shù)資料
| 型號： | AK9824 |
| 廠商： | Asahi Kasei Microsystems Co.,Ltd |
| 英文描述： | Aluminum Snap-In Capacitor; Capacitance: 2200uF; Voltage: 160V; Case Size: 35x45 mm; Packaging: Bulk |
| 中文描述： | 2K / 4Kbit?與2通道8位的EEPROM / A轉(zhuǎn)換器 |
| 文件頁數(shù)： | 3/17頁 |
| 文件大小： | 171K |
| 代理商： | AK9824 |
ASAHI KASEI
[AK9822/24]
DAD01E-00
1999/05
- 3 -
Functional Description
The AK9822/24 is composed of EEPROM and the 8bit D/A converter of two channels with the
output buffer amplifier.
The AK9822/24 can connect to the serial communication port of popular one chip microcomputer
directly (3 line negative clock synchronous interface).
The AK9822/24 takes the data of the DI pin by the rising edge of the SK pin and outputs the data
from the DO pin by the falling edge of the SK pin.
The AK9822/24 has 7 instructions such as READ, WRITE, WREN, WRDS, PDEN, PDDS and CALL.
The AK9822/24 is operated by inputting these instructions from the serial interface. Each instruction
is organized by op-code block (8bits), address block (8bits) and data (8bits
2).
The DO pin is "Hi-Z" state except that the DO pin outputs the data of the internal register and the
status of Ready/Busy.
WRITE protection function
There are two states such as the WRITE enable state and the WRITE disable state in the
AK9822/24. In the WRITE disable state the WRITE instruction becomes invalid and is not executed.
When Vcc is applied to the part, the part powers up in the WRITE disable state and the part
becomes the WRITE enable state by inputting the WREN instruction. The WRITE enable state
continues until the WRDS instruction is executed or Vcc is removed from the part.
Execution of a READ instruction is independent of both WREN and WRDS instructions.
Power down function
There are two modes such as the power down mode and the normal mode in the AK9822/24. When
the AK9822/24 is in the power down mode, the D/A converter section is in the standby state. At this
time, the outputs of the D/A converters become "Hi-Z".
When Vcc is applied to the part, the AK9822/24 is in the power down mode. When a AUTO READ
function is executed, the part becomes the normal mode. After the AUTO READ function is
executed, the mode of the part can be switched by the PDEN and PDDS instructions. The
AK9822/24 becomes the power down mode by inputting the PDEN instruction. The part is in the
power down mode until the PDDS instruction is executed. When the PDDS instruction is executed,
the part becomes the normal mode.
When returning to the normal mode from the power down mode, the D/A converters output the
voltage value set before entering the power down mode. The relation between the D/A converter
state and the mode are shown in the table 1.
Mode
State of D/A converter
Power down mode
Normal mode
standby
normal
Table 1. The relation between the state of D/A converter and the mode
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AK9824M | Aluminum Snap-In Capacitor; Capacitance: 270uF; Voltage: 160V; Case Size: 20x25 mm; Packaging: Bulk |
| AKA-0025 | Delay Line |
| AKA-0025S | Delay Line |
| AKA-0030 | Delay Line |
| AKA-0030S | Delay Line |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AK9824M | 制造商:AKM 制造商全稱:AKM 功能描述:2K / 4Kbit EEPROM with 2ch 8bit D/A Converter |
| AK982M | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:EEPROM |
| AK9844 | 制造商:AKM 制造商全稱:AKM 功能描述:4Kbit EEPROM with 4ch 8bit D/A Converter |
| AK9844A | 制造商:AKM 制造商全稱:AKM 功能描述:4Kbit EEPROM with 4ch 8bit D/A Converter |
| AK9844AV | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:16pin TSSOP |
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