Datasheet MAX7219, MAX7221 (Analog Devices) - 8
| Hersteller | Analog Devices |
| Beschreibung | Serially Interfaced, 8-Digit, LED Display Drivers |
| Seiten / Seite | 15 / 8 — Table 5. Code B Font. 7-SEGMENT. REGISTER DATA. ON SEGMENTS = 1. … |
| Dateiformat / Größe | PDF / 1.4 Mb |
| Dokumentensprache | Englisch |
Table 5. Code B Font. 7-SEGMENT. REGISTER DATA. ON SEGMENTS = 1. CHARACTER. D7*. D6–D4. DP*. Table 6. No-Decode Mode Data Bits and
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Textversion des Dokuments
MAX7219/MAX7221 Serially Interfaced, 8-Digit LED Display Drivers
Table 5. Code B Font 7-SEGMENT REGISTER DATA ON SEGMENTS = 1 CHARACTER D7* D6–D4 D3 D2 D1 D0 DP* A B C D E F G
0 X 0 0 0 0 1 1 1 1 1 1 0 1 X 0 0 0 1 0 1 1 0 0 0 0 2 X 0 0 1 0 1 1 0 1 1 0 1 3 X 0 0 1 1 1 1 1 1 0 0 1 4 X 0 1 0 0 0 1 1 0 0 1 1 5 X 0 1 0 1 1 0 1 1 0 1 1 6 X 0 1 1 0 1 0 1 1 1 1 1 7 X 0 1 1 1 1 1 1 0 0 0 0 8 X 1 0 0 0 1 1 1 1 1 1 1 9 X 1 0 0 1 1 1 1 1 0 1 1 — X 1 0 1 0 0 0 0 0 0 0 1 E X 1 0 1 1 1 0 0 1 1 1 1 H X 1 1 0 0 0 1 1 0 1 1 1 L X 1 1 0 1 0 0 0 1 1 1 0 P X 1 1 1 0 1 1 0 0 1 1 1 blank X 1 1 1 1 0 0 0 0 0 0 0 *The decimal point is set by bit D7 = 1
Table 6. No-Decode Mode Data Bits and Intensity Control Corresponding Segment Lines and Interdigit Blanking
The MAX7219/MAX7221 allow display brightness to be A controlled with an external resistor (RSET) connected between V+ and ISET. The peak current sourced from the segment drivers is nominally 100 times the current F B entering ISET. This resistor can either be fixed or variable G to allow brightness adjustment from the front panel. Its
STANDARD 7-SEGMENT LED
minimum value should be 9.53kΩ, which typically sets the E C segment current at 40mA. Display brightness can also be controlled digitally by using the intensity register. D DP Digital control of display brightness is provided by an internal pulse-width modulator, which is controlled by the lower nibble of the intensity register. The modulator scales the average segment current in 16 steps from a maximum of
REGISTER DATA
31/32 down to 1/32 of the peak current set by RSET (15/16
D7 D6 D5 D4 D3 D2 D1 D0
to 1/16 on MAX7221). Table 7 lists the intensity register Corresponding format. The minimum interdigit blanking time is set to 1/32 Segment Line DP A B C D E F G of a cycle. www.maximintegrated.com Maxim Integrated │ 8
Table 5. Code B Font 7-SEGMENT REGISTER DATA ON SEGMENTS = 1 CHARACTER D7* D6–D4 D3 D2 D1 D0 DP* A B C D E F G
0 X 0 0 0 0 1 1 1 1 1 1 0 1 X 0 0 0 1 0 1 1 0 0 0 0 2 X 0 0 1 0 1 1 0 1 1 0 1 3 X 0 0 1 1 1 1 1 1 0 0 1 4 X 0 1 0 0 0 1 1 0 0 1 1 5 X 0 1 0 1 1 0 1 1 0 1 1 6 X 0 1 1 0 1 0 1 1 1 1 1 7 X 0 1 1 1 1 1 1 0 0 0 0 8 X 1 0 0 0 1 1 1 1 1 1 1 9 X 1 0 0 1 1 1 1 1 0 1 1 — X 1 0 1 0 0 0 0 0 0 0 1 E X 1 0 1 1 1 0 0 1 1 1 1 H X 1 1 0 0 0 1 1 0 1 1 1 L X 1 1 0 1 0 0 0 1 1 1 0 P X 1 1 1 0 1 1 0 0 1 1 1 blank X 1 1 1 1 0 0 0 0 0 0 0 *The decimal point is set by bit D7 = 1
Table 6. No-Decode Mode Data Bits and Intensity Control Corresponding Segment Lines and Interdigit Blanking
The MAX7219/MAX7221 allow display brightness to be A controlled with an external resistor (RSET) connected between V+ and ISET. The peak current sourced from the segment drivers is nominally 100 times the current F B entering ISET. This resistor can either be fixed or variable G to allow brightness adjustment from the front panel. Its
STANDARD 7-SEGMENT LED
minimum value should be 9.53kΩ, which typically sets the E C segment current at 40mA. Display brightness can also be controlled digitally by using the intensity register. D DP Digital control of display brightness is provided by an internal pulse-width modulator, which is controlled by the lower nibble of the intensity register. The modulator scales the average segment current in 16 steps from a maximum of
REGISTER DATA
31/32 down to 1/32 of the peak current set by RSET (15/16
D7 D6 D5 D4 D3 D2 D1 D0
to 1/16 on MAX7221). Table 7 lists the intensity register Corresponding format. The minimum interdigit blanking time is set to 1/32 Segment Line DP A B C D E F G of a cycle. www.maximintegrated.com Maxim Integrated │ 8