參數(shù)資料
型號： MAX7221ENG
廠商： MAXIM INTEGRATED PRODUCTS INC
元件分類： 顯示驅動器
英文描述： Serially Interfaced, 8-Digit LED Display Drivers
中文描述： LED DISPLAY DRIVER, PDIP24
封裝： 0.300 INCH, PLASTIC, MS-001, DIP-24
文件頁數(shù)： 7/16頁
文件大小： 186K
代理商： MAX7221ENG
Initial Power-Up
On initial power-up, all control registers are reset, the
display is blanked, and the MAX7219/MAX7221 enter
shutdown mode. Program the display driver prior to
display use. Otherwise, it will initially be set to scan one
digit, it will not decode data in the data registers, and
the intensity register will be set to its minimum value.
Dec ode-Mode Register
The decode-mode register sets BCD code B (0-9, E, H,
L, P, and -) or no-decode operation for each digit. Each
bit in the register corresponds to one digit. A logic high
selects code B decoding while logic low bypasses the
decoder. Examples of the decode mode control-regis-
ter format are shown in Table 4.
When the code B decode mode is used, the decoder
looks only at the lower nibble of the data in the digit
registers (D3–D0), disregarding bits D4–D6. D7, which
sets the decimal point (SEG DP), is independent of the
decoder and is positive logic (D7 = 1 turns the decimal
point on). Table 5 lists the code B font.
When no-decode is selected, data bits D7–D0 corre-
spond to the segment lines of the MAX7219/MAX7221.
Table 6 shows the one-to-one pairing of each data bit
to the appropriate segment line.
M
S erially Interfac ed, 8-Digit LED Display Drivers
_______________________________________________________________________________________
7
Table 2. Register Address Map
Table 3. Shutdown Register Format (Address (Hex) = XC)
Table 4. Decode-Mode Register Examples (Address (Hex) = X9)
No-Op
X
0
0
0
0
0
ADDRESS
0
1
X0
X1
Digit 1
X
0
0
0
1
1
0
1
X2
0
X3
0
Digit 2
X
Digit 3
X
0
1
1
0
Digit 0
X
0
0
1
X4
X5
Digit 5
X
0
1
1
1
1
0
1
X6
0
X7
0
Digit 6
X
Digit 4
X
Digit 7
X
1
0
0
0
0
0
1
X8
X9
1
Decode
Mode
X
Intensity
X
1
0
0
1
1
0
1
XA
XB
Shutdown
X
1
1
1
0
1
0
1
XC
1
XF
1
Display
Test
X
Scan Limit
X
D15–
D12
D11
D10
REGISTER
D9
D8
HEX
CODE
X
Shutdown
Mode
XC
X
X
X
X
X
X
X
X
X
0
X
1
X
X
X
REGISTER DATA
MODE
Normal
Operation
XC
0
No decode for digits 7–0
0
0
1
D7
DECODE MODE
0
00
0
0
1
D6
D5
0
1
D4
D3
0
1
Code B decode for digits 7–0
Code B decode for digit 0
No decode for digits 7–1
0
0
0
1
D2
HEX
CODE
0
REGISTER DATA
0
FF
1
1
D1
D0
0
1
0
1
0
0
0
01
0
Code B decode for digits 3–0
No decode for digits 7–4
1
1
1
1
0F
ADDRESS CODE
(HEX)
D6
D4
D7
D5
D2
D0
D3
D1
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MAX7219 Serially Interfaced, 8-Digit LED Display Drivers
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相關代理商/技術參數(shù)
參數(shù)描述
MAX7221ENG+ 功能描述:LED顯示驅動器 8-Digit LED Display Driver RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube
MAX7221ERG 功能描述:LED顯示驅動器 RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube
MAX7221EWG 功能描述:LED顯示驅動器 RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube
MAX7221EWG+ 功能描述:LED顯示驅動器 8-Digit LED Display Driver RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube
MAX7221EWG+T 功能描述:LED顯示驅動器 8-Digit LED Display Driver RoHS:否 制造商:Micrel 數(shù)位數(shù)量:5 片段數(shù)量: 安裝風格:SMD/SMT 封裝 / 箱體:PLCC-44 工作電源電壓:4.75 V to 11 V 最大電源電流:10 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝:Tube
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