MAX6850 MAXIM [Maxim Integrated Products], MAX6850 Datasheet - Page 32

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

R
80kΩ)
C
C
typically 2pF
4-Wire Interfaced, 7-, 14-, and 16-Segment Alpha-
numeric Vacuum-Fluorescent Display Controller
Table 41. PORT0 Register Format
Table 42. PORT1 Register Format
32
General-purpose output, logic 0.
General-purpose output, logic 1.
This is the power-up condition.
Output gives blink status: zero if blink phase
P0; 1 if blink phase P1.
DOUT output.
Inverted 625Hz square-wave output 1 in
shutdown.
Inverted 1250Hz square-wave output 1 in
shutdown.
Inverted 2500Hz square-wave output 1 in
shutdown.
Output gives inverted shutdown status:
1 if shutdown mode; zero if operating mode.
General-purpose output, logic 0.
This is the power-up condition.
General-purpose output, logic 1.
Outp ut g i ves b l i nk status: zer o i f b l i nk p hase
P 0; 1 if blink phase P1.
DOUT output.
625Hz square-wave output zero in
shutdown.
1250Hz square-wave output zero in
shutdown.
2500Hz square-wave output zero in
shutdown.
Output gives shutdown status: zero if
shutdown mode; 1 if operating mode.
OSC
OSC
STRAY
______________________________________________________________________________________
= external resistor in kΩ (allowable range 8kΩ to
= external capacitor in pF
= stray capacitance from OSC1 to GND in pF,
PORT1 PORT BEHAVIOR
PORT0 PORT BEHAVIOR
COMMAND
COMMAND
ADDRESS
ADDRESS
0x0C
0x0C
0x0C
0x0C
0x0C
0x0C
0x0C
0x0C
0x0D
0x0D
0x0D
0x0D
0x0D
0x0D
0x0D
0x0D
D7
D7
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
For OSC = 4MHz, R
The effective value of C
external capacitor used, but also the stray capacitance
from OSC1 to GND. This capacitance is usually in the
1pF to 5pF range, depending on the layout used.
D6
D6
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
D5
D5
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
REGISTER DATA
REGISTER DATA
D4
D4
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
OSC
D3
D3
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
OSC
is 10kΩ and C
D2
D2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
includes not only the actual
D1
D1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
OSC
D0
D0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
is 56pF.
HEX CODE
HEX CODE
0xX0
0xX1
0xX2
0xX3
0xX4
0xX5
0xX6
0xX7
0xX0
0xX1
0xX2
0xX3
0xX4
0xX5
0xX6
0xX7