Datasheet > AS1105WE4

AS1105WE4

更新时间： 2024-02-26 11:11:56

品牌	Logo	应用领域
艾迈斯 - AMSCO		驱动器接口集成电路光电二极管
页数	文件大小	规格书
12页	142K
描述
Serially Interfaced, 4-Digit LED Driver

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数据手册

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AS1105WE4 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Contact Manufacturer	零件包装代码：	SOIC
包装说明：	SOP,	针数：	20
Reach Compliance Code：	unknown	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	5.64
Is Samacsys：	N	数据输入模式：	SERIAL
显示模式：	DIGIT	接口集成电路类型：	LED DISPLAY DRIVER
JESD-30 代码：	R-PDSO-G20	JESD-609代码：	e3
湿度敏感等级：	3	复用显示功能：	NO
位数/字符：	4-DIGIT	功能数量：	1
区段数：	7	端子数量：	20
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	SOP
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE
峰值回流温度（摄氏度）：	260	认证状态：	Not Qualified
座面最大高度：	2.64 mm	最大供电电压：	5.5 V
最小供电电压：	4 V	标称供电电压：	5 V
表面贴装：	YES	温度等级：	INDUSTRIAL
端子面层：	MATTE TIN	端子形式：	GULL WING
端子节距：	1.27 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	40	Base Number Matches：	1

AS1105WE4 数据手册

Data Sheet AS1105

t_CSW

LOAD

CLK

t_CS

t_CL

t_CH

t_CP

t_LDCK

t_DH

t_DS

DIN

D15

D14

t_DO

DOUT

Figure 1: Timing diagram

D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0

Address MSB Data LSB

Table 1: Serial data format (16 bits)

32bit memory. Each digit can be controlled directly without

rewriting the whole contents. The control registers consist

of decode mode, display intensity, number of scanned

digits, shutdown, display test and reset/external clock

Detailed Description

Serial-Addressing Modes

Programming of the AS1105 is done via the 4 wire serial

interface. programming sequence consists of 16-bit

Shutdown Mode

packages. The data is shifted into the internal 16 Bit

The AS1105 features a shutdown mode, where it consumes

only 20µA current. The shutdown mode is entered via a

write to register 0Ch. Then all segment current sources are

pulled to ground and all digit drivers are connected to VDD,

so that nothing is displayed. All internal digit registers keep

the programmed values. The shutdown mode can either be

used for power saving or for generating a flashing display

by repeatedly entering and leaving the shutdown mode. The

AS1105 needs typically 250µs to exit the shutdown mode.

During shutdown the AS1105 is fully programmable. Only

the display test function overrides the shutdown mode.

rising edge of the LOAD signal the data is latched into

digital or control register depending on the address. The

LOAD signal must go to high after the 16^thrising clock

edge. The LOAD signal can also come later but just before

the next rising edge of CLK, otherwise data would be lost.

The content of the internal shift register is applied 16.5

clock cycles later to the DOUT pin. The data is clocked out

at the falling edge of CLK. The Bits of the 16Bit-

programming package are described in table 1. The first 4

Bits D15-D12 are ”don’t care, D11-D8 contain the address

and D7-D0 contain the data. The first bit is D15, the most

significant bit (MSB). The exact timing is given in figure 1.

Initial Power-Up

After powering up the system all register are reset, so that

the display is blank. The AS1105 starts the shutdown mode.

All registers should be programmed for normal operation.

The default settings enable only scan of one digit, the

internal decoder is disabled, data register and intensity

Digit and Control Registers

The AS1105 incorporates 12 registers, which are listed in

Table 2. The digit and control registers are selected via the

4Bit address word. The 4 digit registers are realized with a

Revision 1.32, Oct. 2004

Page 4 of 12

1 2 345 6 7...12

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