参数资料
型号: AS1108PL
厂商: ams
文件页数: 11/21页
文件大小: 0K
描述: IC LED 4-DIGIT DRIVER 20-PDIP
标准包装: 18
显示器类型: LED
配置: 7 段 + DP
接口: 串行
数字或字符: 4 位数字
电流 - 电源: 330mA
电源电压: 2.7 V ~ 5.5 V
工作温度: 0°C ~ 70°C
安装类型: 通孔
封装/外壳: 20-DIP(0.300",7.62mm)
供应商设备封装: 20-PDIP
包装: 管件
AS1108
Datasheet - D e t a i l e d D e s c r i p t i o n
Shutdown Register (0xXC)
The Shutdown Register controls AS1108 shutdown mode (see Shutdown Mode on page 9).
Table 8. Shutdown Register Format (Address (HEX) = 0xXC))
Mode
HEX Code
D7
D6
D5
Register Data
D4 D3
D2
D1
D0
Shutdown Mode,
Reset Feature Register to Default Settings
Shutdown Mode, Feature Register Unchanged
Normal Operation,
Reset Feature Register to Default Settings
Normal Operation, Feature Register Unchanged
0x00
0x80
0x01
0x81
0
1
0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
0
1
1
Decode Enable Register (0xX9)
The Decode Enable Register sets the decode mode. BCD/HEX decoding (either BCD code – characters 0:9, E, H, L,
P, and -, or HEX code – characters 0:9 and A:F) is selected by bit D2 (page 13) of the Feature Register. The Decode
Enable Register is used to select the decode mode or no-decode for each digit. Each bit in the Decode Enable Regis-
ter corresponds to its respective display digit (i.e., bit D0 corresponds to digit 0, bit D1 corresponds to digit 1 and so
on). Table 10 lists some examples of the possible settings for the Decode Enable Register bits.
Note: A logic high enables decoding and a logic low bypasses the decoder altogether.
When decode mode is used, the decoder looks only at the lower-nibble (bits D3:D0) of the data in the Digit-Registers,
disregarding bits D6:D4. Bit D7 sets the decimal point (SEG DP) independent of the decoder and is positive logic (bit
D7 = 1 turns the decimal point on). Table 10 lists the code-B font; Table 11 lists the HEX font.
When no-decode mode is selected, data bits D7:D0 of the Digit-Registers correspond to the segment lines of the
AS1108. Table 12 shows the 1:1 pairing of each data bit and the appropriate segment line.
Table 9. Decode Enable Register Format (Address (HEX) = 0xX9))
Decode Mode
No decode for digits 3:0
Code-B/HEX decode for digit 0. No decode for digits 3:1
Code-B/HEX decode for digits 3:0
HEX Code
0x00
0x01
0xFF
D7
X
X
X
D6
X
X
X
Register Data
D5 D4 D3 D2
X X 0 0
X X 0 0
X X 1 1
D1
0
0
1
D0
0
1
1
Figure 11. Standard 7-Segment LED Intensity Control and Inter-Digit Blanking
A
F
G
B
Table 10. Code-B Font
E
D
C
DP
7-Segment
Register Data
On Segments = 1
Character
D7
?
D6:D4
D3
D2
D1
D0
DP
?
A
B
C
D
E
F
G
0
1
2
3
4
5
X
X
X
X
X
X
0
0
0
0
0
0
0
0
0
0
1
1
0
0
1
1
0
0
0
1
0
1
0
1
1
0
1
1
0
1
1
1
1
1
1
0
1
1
0
1
1
1
1
0
1
1
0
1
1
0
1
0
0
0
1
0
0
0
1
1
0
0
1
1
1
1
Revision 2.13
10 - 20
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