MAX6850 MAXIM [Maxim Integrated Products], MAX6850 Datasheet - Page 29

• Manufacturer Part Number: MAX6850
• Description: 4-Wire Interfaced, 7-, 14-, and 16-Segment Alphanumeric Vacuum-Fluorescent Display Controller
• Manufacturer: MAXIM [Maxim Integrated Products]

4-Wire Interfaced, 7-, 14-, and 16-Segment Alpha-
Table 33. Setting Output Map Address Pointer
Table 34. Writing Output Map Data
Table 35. Reading Output Map Data
Table 36. Filament Bridge Driver Timing
Set output map address to minimum (0x00) with data
0x80. (Note that this address is set as a power-up
default.)
Set output map address to maximum 0x53 with data
0xD3.
Write output map data; output map address pointer is
autoincremented after the output map data has been
written to the current location.
Read output map data; output map address pointer is
autoincremented after the output map data has been
read from the current location.
TIMING POINT
(OSC = 4MHz)
numeric Vacuum-Fluorescent Display Controller
Total 4MHz
cycles
(A)
(B)
(C)
(D)
(E)
______________________________________________________________________________________
High for (FilOn) cycles
Low for (FilOn) cycles
PHASE1 BEHAVIOR
Low for (199 - FilOn)
Low for (199 - FilOn)
400 cycles = 100µs
MODE
MODE
MODE
Low for (2) cycles
cycles
cycles
High for (FilOn) cycles
Low for (FilOn) cycles
PHASE2 BEHAVIOR
Low for (199 - FilOn)
Low for (199 - FilOn)
400 cycles = 100µs
Low for (2) cycles
cycles
cycles
COMMAND
COMMAND
COMMAND
ADDRESS
ADDRESS
ADDRESS
0x06
0x06
0x06
0x86
D7
D7
D7
DUTY = 1 (MIN)
1
1
0
0
400 cycles =
EXAMPLE 1
100µs
198
198
1
2
1
D6
D6
D6
0
1
D5
D5
D5
0
1
REGISTER DATA
REGISTER DATA
REGISTER DATA
7 bits of output map data
7 bits of output map data
400 cycles =
EXAMPLE 2
DUTY = 100
D4
D4
D4
0
1
100µs
100
100
99
99
2
D3
D3
D3
0
1
D2
D2
D2
0
0
400 cycles =
EXAMPLE 3
DUTY = 198
100µs
D1
D1
D1
0
0
198
198
1
2
1
D0
D0
D0
0
1
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