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MAX6953EAX+ Datasheet

  • MAX6953EAX+

  • IC DRVR DSPL LED 36-SSOP

  • 364.10KB

  • 23頁(yè)

  • Maxim   Maxim

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2-Wire Interfaced, 2.7V to 5.5V, 4-Digit 5
Matrix LED Display Driver
MAX6953
Table 15. Character Map
MSB
x000
LSB
x001
x010
x011
x100
x101
x110
x111
鉁?/div>
7
Global Clear Digit Data (R Data Bit D5) Format
When global digit data clear is set, the digit data for
both planes P0 and P1 for all digits are cleared during
the acknowledge (Table 13).
Blink Phase Readback (P Data Bit D7) Format
When the configuration register is read, the P bit
reflects the state of the blink output pin at that time
(Table 14).
0000
RAM00
RAM16
0001
RAM01
RAM17
Character Generator Font Mapping
0010
RAM02
RAM18
0011
RAM03
RAM19
The font is a 5
鉁?/div>
7 matrix comprising 104 characters in
ROM, and 24 user-definable characters. The selection
from the total of 128 characters is represented by the
lower 7 bits of the 8-bit digit registers. The most-signifi-
cant bit, shown as x in the ROM map, is zero to light
LEDs as shown by the black segments in Table 15, and
1 to display the inverse.
The character map follows the Arial font for 96 charac-
ters in the range 0x0101000 through x1111111. The
first 32 characters map the 24 user-definable positions
(RAM00 to RAM23), plus eight extra common charac-
ters in ROM.
0100
RAM04
RAM20
0101
RAM05
RAM21
0110
RAM06
RAM22
User-Defined Fonts
The 24 user-definable characters are represented by
120 entries of 7-bit data, five entries per character, and
are stored in MAX6953's internal RAM.
The 120 user-definable font data entries are written and
read through a single register, address 0x05. An
autoincrementing font address pointer in the MAX6953
indirectly accesses the font data. The font address
pointer can be written, setting one of 120 addresses
between 0x00 and 0xF7, but cannot be read back. The
font data is written to and read from MAX6953 indirect-
ly, using this font address pointer. Unused font loca-
tions can be used as general-purpose scratch RAM,
bearing in mind that the font registers are only 7 bits
wide, not 8.
Table 16 shows how the single user-defined font regis-
ter 0x05 is used to set the font address pointer, write
font data, and read font data. A read action always
returns font data from the font address pointer position.
A write action sets the 7-bit font address pointer if the
MSB is set, or writes 7-bit font data to the font address
pointer position if the MSB is clear.
The font address pointer autoincrements after a valid
access to the user-definable font data. Auto-
incrementing allows the 120 font data entries to be writ-
ten and read back very quickly because the font point-
er address need only be set once. When the last data
location 0xF7 is written, the font address pointer autoin-
crements to address 0x80. If the font address pointer is
0111
RAM07
RAM23
1000
RAM08
1001
RAM09
1010
RAM10
1011
RAM11
1100
RAM12
1101
RAM13
1110
RAM14
1111
RAM15
14
______________________________________________________________________________________

MAX6953EAX+ 產(chǎn)品屬性

  • Lead (SnPb) Finish for COTSObsolescence Mitigation Program

  • 30

  • 集成電路 (IC)

  • PMIC - 顯示器驅(qū)動(dòng)器

  • -

  • LED

  • 5 x 7（矩陣）

  • I²C

  • 4 位數(shù)字

  • 12mA

  • 2.7 V ~ 5.5 V

  • -40°C ~ 85°C

  • 表面貼裝

  • 36-BSOP（0.295"，7.50mm 寬）

  • 36-SSOP

  • 管件

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