Datasheet

MAX6952
4-Wire Interfaced, 2.7V to 5.5V,
4-Digit 5
✕
7 Matrix LED Display Driver
______________________________________________________________________________________ 11
MAX6952
DOUT
MICROCONTROLLER
CLK
DIN
MAX6952
MAX6952
CLK
DIN
CS
DOUT
CLK
DIN
CS
DOUT
CLK
DIN
CS
DOUT
CS
Figure 6. MAX6952 Daisy-Chain Connection
REGISTER DATA
MODE
D7 D6 D5 D4 D3 D2 D1 D0
Slow blinking (Segments are refreshed using plane P0 for 1s, plane P1
for 1s, for OSC = 4MHz.
)
PXRTE0XS
Table 8. Blink Rate Selection (B Data Bit D2) Format
REGISTER DATA
MODE
D7 D6 D5 D4 D3 D2 D1 D0
Blink function is disabled. P X R T 0 B X S
Blink function is enabled. P X R T 1 B X S
Table 9. Global Blink Enable/Disable (E Data Bit D3) Format
When blink is globally disabled, then only the digit data
in plane P0 is used to control the display. The digit data
in plane P1 is ignored.
Global Blink Timing Synchronization
(T Data Bit D4) Format
By setting the T bit in multiple MAX6952s at the same
time (or in quick succession), the blink timing can be
synchronized across all the devices (Table 11). Note
that the display multiplexing sequence is also reset,
which might give rise to a one-time display flicker when
the register is written.
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 is cleared (Table 12).
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 13).
Character Generator Font Mapping
The font is a 5
✕
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 below, is zero to
light LEDs as shown by the black segments in Table
14, and 1 to display the inverse.
The character map follows the Arial font for 96 charac-
ters in the x0101000 through x1111111 range. The first