參數(shù)資料
型號: MAX7219ERG
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: 顯示驅(qū)動器
英文描述: Serially Interfaced, 8-Digit LED Display Drivers
中文描述: LED DISPLAY DRIVER, CDIP24
封裝: CERDIP-24
文件頁數(shù): 9/16頁
文件大?。?/td> 186K
代理商: MAX7219ERG
S c an-Limit Register
The scan-limit register sets how many digits are dis-
played, from 1 to 8. They are displayed in a multiplexed
manner with a typical display scan rate of 800Hz with 8
digits displayed. If fewer digits are displayed, the scan
rate is 8f
OSC
/N, where N is the number of digits
scanned. Since the number of scanned digits affects
the display brightness, the scan-limit register should
not be used to blank portions of the display (such as
leading zero suppression). Table 8 lists the scan-limit
register format.
M
S erially Interfac ed, 8-Digit LED Display Drivers
_______________________________________________________________________________________
9
Table 7. Intensity Register Format (Address (Hex) = XA)
DUTY CYCLE
MAX7219
1/32
(min on)
3/32
5/32
7/32
9/32
11/32
13/32
15/32
17/32
19/32
21/32
23/32
25/32
27/32
29/32
MAX7221
1/16
(min on)
2/16
3/16
4/16
5/16
6/16
7/16
8/16
9/16
10/16
11/16
12/16
13/16
14/16
15/16
15/16
(max on)
D6
D7
D4
D2
D3
D0
D5
D1
HEX
CODE
X
X
X
X
0
0
0
0
X0
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
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
0
1
1
1
1
0
0
0
0
1
1
1
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
X1
X2
X3
X4
X5
X6
X7
X8
X9
XA
XB
XC
XD
XE
X
31/32
X
X
X
1
1
1
1
XF
Table 8. Scan-Limit Register Format (Address (Hex) = XB)
X
X
X
Display digit 0 only*
Display digits 0 & 1*
Display digits 0 1 2*
Display digits 0 1 2 3
Display digits 0 1 2 3 4
Display digits 0 1 2 3 4 5
Display digits 0 1 2 3 4 5 6
Display digits 0 1 2 3 4 5 6 7
X
X
X
X
X
X
X
X
X
X
D7
SCAN LIMIT
X1
X2
X
X0
X
X
X
X
X
0
0
D6
D5
0
1
1
0
D4
D3
X
X
X
X
X
0
X3
X4
D2
HEX
CODE
0
REGISTER DATA
0
X
X
X
X
D1
D0
0
1
1
0
1
0
X
X
X
X
X5
X6
X
X
X
X
1
1
0
1
1
0
X
X
X7
X
X
1
1
1
*See Scan-Limit Registersection for application.
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