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MAX6952 Datasheet(Hoja de datos) 6 Page - Maxim Integrated Products

No. de Pieza. MAX6952
Descripción  4-Wire Interfaced, 2.7V to 5.5V, 4-Digit 5 .7 Matrix LED Display Driver
Descarga  21 Pages
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Fabricante  MAXIM [Maxim Integrated Products]
Página de inicio  http://www.maxim-ic.com
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 6 page
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CLK and DIN may be used to transmit data to other
peripherals. The MAX6952 ignores all activity on CLK
and DIN except when CS is low.
Control and Operation Using the 4-Wire Interface
Controlling the MAX6952 requires sending a 16-bit
word. The first byte, D15 through D8, is the command
byte (Table 3), and the second byte, D7 through D0, is
the data byte.
Connecting Multiple MAX6952s to the 4-Wire Bus
Multiple MAX6952s may be daisy-chained by connect-
ing the DOUT of one device to the DIN of the next, and
driving CLK and CS lines in parallel (Figure 6). Data at
DIN propagates through the internal shift registers and
appears at DOUT 15.5 clock cycles later, clocked out
on the falling edge of CLK. When sending commands
to daisy-chained MAX6952s, all devices are accessed
at the same time. An access requires (16 x n) clock
cycles, where n is the number of MAX6952s connected
together. To update just one device in a daisy-chain,
the user can send the no-op command (0x00) to the
others.
Writing Device Registers
The MAX6952 contains a 16-bit shift register into which
DIN data are clocked on the rising edge of SCLK, when
CS is low. When CS is high, transitions on SCLK have
no effect. When CS goes high, the 16 bits in the shift
4-Wire Interfaced, 2.7V to 5.5V,
4-Digit 5 7 Matrix LED Display Driver
6
_______________________________________________________________________________________
DIGIT O0 O1
O2
O3
O4
O5
O6
O7
O8
O9 O10 O11 O12 O13 O14 O15 O16 O17 O18 O19 O20 O21 O22 O23
1
Digit 0 rows (cathodes) R1 to R7
Digit 1 rows (cathodes) R1 to R7
Digit 0 columns (anodes)
C1 to C5
Digit 1 columns
(anodes) C6 to C10
2
Digit 2 rows (cathodes) R1 to R7
Digit 3 rows (cathodes) R1 to R7
Digit 2 columns (anodes)
C1 to C5
Digit 3 columns
(anodes) C6 to C10
Table 1. Connection Scheme for Four Monocolor Digits
DIGIT O0
O1
O2
O3
O4
O5
O6
O7
O8
O9 O10 O11 O12 O13 O14 O15 O16 O17 O18 O19 O20 O21 O22 O23
Digit 0 columns (anodes) C1 to C10
1
Digit 0 rows (cathodes) R1 to R14
- the 5 green anodes -
- the 5 red anodes -
Digit 1 columns (anodes) C1 to C10
2
Digit 1 rows (cathodes) R1 to R14
- the 5 green anodes -
- the 5 red anodes -
Table 2. Connection Scheme for Two Bicolor Digits
D15
D14
D13
D12
D11
D10
D9
D8
D7
D6
D5
D4
D3
D2
D1
D0
R/
W
ADDRESS
MSB
DATA
LSB
Table 3. Serial-Data Format (16 Bits)
ISET
OSC
BLINK
CLK
CS
DIN
DOUT
SERIAL INTERFACE
RAM
BLINK
SPEED
SELECT
CONFIGURATION
REGISTERS
CHARACTER
GENERATOR
ROM
CHARACTER
GENERATOR
RAM
CURRENT
SOURCE
DIVIDER/
COUNTER
NETWORK
ROW
MULTIPLEXER
PWM
BRIGHTNESS
CONTROL
LED
DRIVERS
O0 TO O23
MAX6952
Figure 1. Functional Diagram




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