MAX6852 MAXIM [Maxim Integrated Products], MAX6852 Datasheet - Page 29

• Manufacturer Part Number: MAX6852
• Description: 4-Wire Interfaced, 5 x 7 Matrix Vacuum- Fluorescent Display Controller
• Manufacturer: MAXIM [Maxim Integrated Products]

Table 33. Reading Output Map Data
Table 34. Filament Bridge Driver Timing
Table 35. Filament Duty-Cycle Register Format
Table 36. PHASE1 Register Format
Minimum setting example (01)
Maximum setting example (199 or 0xC7)
Read output map data; output map address pointer is
autoincremented after the output map data has been
read from the current location.
General-purpose output, logic 0.
This is the power-up condition.
General-purpose output, logic 1.
Output gives blink status:
0 if blink phase P0; 1 if blink phase P1.
Filament drive PHASE1 (logic 0 during
shutdown).
TIMING POINT
(OSC = 4MHz)
Total 4MHz
cycles
(C)
(D)
(A)
(B)
(E)
FILAMENT DUTY CYCLE
PHASE1 BEHAVIOR
______________________________________________________________________________________
4-Wire Interfaced, 5
High for (FilOn) cycles
Low for (FilOn) cycles
PHASE1 BEHAVIOR
Low for (199 - FilOn)
Low for (199 - FilOn)
400 cycles = 100µs
Low for (2) cycles
MODE
cycles
cycles
Fluorescent Display Controller
High for (FilOn) cycles
Low for (FilOn) cycles
PHASE2 BEHAVIOR
COMMAND
Low for (199 - FilOn)
Low for (199 - FilOn)
COMMAND
400 cycles = 100µs
ADDRESS
ADDRESS
Low for (2) cycles
0x09
0x09
0x0A
0x0A
0x0A
0x0A
cycles
cycles
COMMAND
ADDRESS
0x86
D7
D7
0
1
X
X
X
X
D6
D6
0
1
X
X
X
X
D7
DUTY = 1 (MIN)
0
400 cycles =
EXAMPLE 1
✕
100µs
D5
D5
0
0
X
X
X
X
198
198
D6
1
2
1
REGISTER DATA
REGISTER DATA
7 Matrix Vacuum-
D4
D4
0
0
X
X
X
X
D5
REGISTER DATA
D3
D3
7 bits of output map data
0
0
X
X
X
X
400 cycles =
EXAMPLE 2
DUTY = 100
D4
100µs
D2
D2
100
100
0
1
X
X
X
X
99
99
2
D3
D1
D1
0
1
0
0
1
1
D2
D0
D0
1
1
0
1
0
1
400 cycles =
EXAMPLE 3
DUTY = 198
100µs
D1
HEX CODE
HEX CODE
198
198
1
2
1
0xC7
0x01
0xX0
0xX1
0xX2
0xX3
D0
29