MAX6852AEE+T Maxim Integrated Products, MAX6852AEE+T Datasheet - Page 10

• Manufacturer Part Number: MAX6852AEE+T
• Description: IC VFD CTRLR MATRIX 16QSOP
• Manufacturer: Maxim Integrated Products

Specifications of MAX6852AEE+T

• Display Type: Vacuum Fluorescent (VF)
• Configuration: 5 x 7 (Matrix)
• Interface: Serial
• Current - Supply: 3.5mA
• Voltage - Supply: 2.7 V ~ 3.6 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Digits Or Characters: -

Table 12 shows the six sequential write commands
required to set a MAX6852’s font character RAM02 with
the data to display character 2 given in Table 7.
The cursor register controls the behavior of the cursor
segments (Table 13). The MAX6852 controls 48 cursors
in 48/1 mode, and 96 cursors in 96/2 mode. The cursor
register selects one digit’s cursor to be lit either contin-
uously or blinking. All the other digits’ cursors are off.
The 7 least significant bits (LSBs) of the cursor register
identify the cursor position. The MSB is clear for the
cursor to be on continuously, and set for the cursor to
be lit only during the first half of each blink period.
The valid cursor position address range is contiguous:
0 to 47 (0x00 to 0x2F) for the 1st digit row, and 48 to 95
(0x30 to 0x5F) for the 2nd digit row. If the cursor regis-
4-Wire Interfaced, 5
Fluorescent Display Controller
Table 3. Initial Power-Up Register Status
10
VFBLANK polarity
Intensity
Grids
Configuration
User-defined font
address pointer
User-defined fonts
Output map pointer
Output map data
Display test
PUMP
Filament duty cycle
PHASE1
PHASE2
PORT0
PORT1
Shift limit
Cursor
Character and
annunciator data
Character and
annunciator data
______________________________________________________________________________________
REGISTER
UP TO
VFBLANK is high to disable the
display
1/16 (min on)
Display has 1 grid
Shutdown enabled,
configuration unlocked
Address 0x80; pointing to the
first user-defined font location
All 24 characters blank
Pointing to first entry address
Predefined for 40-digit display
Normal operation
General-purpose output, logic
Minimum duty cycle
General-purpose output, logic
General-purpose output, logic
General-purpose output, logic
General-purpose output, logic
1 output bit
Off
Clear
Clear
POWER-UP CONDITION
—
Cursor Register
✕
COMMAND
ADDRESS
7 Matrix Vacuum-
UP TO
0x0A
0x0B
0x0C
0x0D
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x0E
0x0F
0x20
0x7F
—
—
ter is programmed with an out-of-range value of 95 to
127 (0x60 to 0x7F), then all cursors are off.
The annunciator registers are organized in bytes, with
each segment of each grid being represented by 2
bits. Thus, the four annunciators segments allowed for
each grid are represented by exactly 1 byte (Table 14).
Annunciators are only available in 48/1 mode. The
annunciator address map is shown in Table 4.
The configuration register is used to enter and exit shut-
down, lock the key VFD configuration settings, select
the blink rate, globally clear the digit and annunciator
data, reset the blink timing, and select between 48/1
and 96/2 display modes (Table 15).
D7
—
X
X
X
X
X
1
1
0
1
0
0
0
0
0
0
0
0
0
D6
—
X
X
X
0
0
0
0
X
0
0
0
0
0
0
0
1
0
0
See Table 30 for power-up patterns.
D5
—
X
X
0
0
0
0
0
X
0
0
0
0
0
0
0
1
0
0
REGISTER DATA
D4
—
X
X
0
0
0
0
0
X
0
0
0
0
0
0
0
0
0
0
Configuration Register
Annunciator Registers
D3
—
X
0
0
X
0
0
0
X
0
0
0
0
0
0
0
0
0
0
D2
—
X
X
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
D1
—
X
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
D0
—
0
0
0
0
0
0
0
0
0
1
0
0
0
1
1
0
0
0