MAX6954 Maxim, MAX6954 Datasheet - Page 25

• Manufacturer Part Number: MAX6954
• Description: 4-Wire Interfaced / 2.7V to 5.5V LED Display Driver with I/O Expander and Key Scan
• Manufacturer: Maxim

Table 16. Configuration Register Format
Table 18. Blink Rate Selection (B Data Bit D2) Format
Table 19. Global Blink Enable/Disable (E Data Bit D3) Format
Table 20. Digit Register Mapping with Blink Globally Enabled
Table 21. Global Blink Timing Synchronization (T Data Bit D4) Format
Table 22. Global Clear Digit Data (R Data Bit D5) Format
Configuration
Register
Digit data for both planes P0 and P1 are unaffected.
Digit data for both planes P0 and P1 are cleared on the rising edge of CS.
Blink function is disabled.
Blink function is enabled.
Blink timing counters are unaffected.
Blink timing counters are reset on the rising edge of CS.
Slow blinking. Segments blink on for 1s, off for 1s with f
Fast blinking. Segments blink on for 0.5s, off for 0.5s with f
MODE
SEGMENT’S BIT SETTING
4-Wire Interfaced, 2.7V to 5.5V LED Display
IN PLANE P1
D7
P
MODE
______________________________________________________________________________________
0
0
1
1
D6
I
Driver with I/O Expander and Key Scan
D5
R
REGISTER DATA
MODE
MODE
D4
MODE
T
D3
E
D2
B
D7
SEGMENT’S BIT SETTING
P
P
D1
X
OSC
IN PLANE P0
D0
OSC
S
= 4MHz.
D6
I
I
0
1
0
1
= 4MHz.
Table 17. Shutdown Control (S Data Bit DO)
Format
Shutdown
Normal
Operation
D5
D7
R
R
P
P
MODE
D7
D6
P
P
REGISTER DATA
I
I
D7
D4
P
P
T
T
Segment off.
Segment on only during the 1st half of each
blink period.
Segment on only during the 2nd half of each
blink period.
Segment on.
D6
D7
P
P
I
I
D5
D6
R
R
I
I
REGISTER DATA
D6
D5
D3
I
I
0
1
0
1
D5
R
R
D4
REGISTER DATA
0
1
REGISTER DATA
D5
R
R
REGISTER DATA
D4
T
T
D4
T
T
BEHAVIOR
SEGMENT
D3
D2
D4
E
E
B
B
T
T
D3
E
E
D3
E
E
D3
E
E
D2
B
B
D2
D2
B
B
D1
0
1
X
X
D2
B
B
D1
X
X
D1
D1
X
X
X
X
D1
X
X
D0
S
S
D0
D0
D0
S
S
S
S
S
S
D0
0
1
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