MAX7456EUI+ Maxim Integrated Products, MAX7456EUI+ Datasheet - Page 29

• Manufacturer Part Number: MAX7456EUI+
• Description: IC ON-SCREEN DISPLAY 28-TSSOP
• Manufacturer: Maxim Integrated Products
• Type: OSD (On-Screen Display) Video Generatorr

Specifications of MAX7456EUI+

• Applications: Security Systems, Video Routing
• Mounting Type: Surface Mount
• Package / Case: 28-TSSOP Exposed Pad, 28-eTSSOP, 28-HTSSOP
• Current - Supply: 58mA
• Voltage - Supply: 4.75 V ~ 5.25 V
• Operating Temperature: -40°C ~ 85°C
• Interface: SPI Serial
• Display Type: OSD
• Digits Or Characters: 256 Characters
• Maximum Clock Frequency: 27 MHz
• Operating Supply Voltage: 5 V
• Maximum Power Dissipation: 2162 mW
• Maximum Operating Temperature: + 85 C
• Maximum Supply Current: 25 mA
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Configuration: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

BIT
2
1
0
DEFAULT
______________________________________________________________________________________
0
0
0
Single-Channel Monochrome On-Screen
Clear Display Memory
0 = Inactive
1 = Clear (fill all display memories with zeros)
Note: This bit is automatically cleared after the operation is completed (the operation requires
20µs). The user does not need to write a 0 afterwards. The status of the bit can be checked by
reading this register.
This operation is automatically performed:
Vertical Sync Clear
Valid only when clear display memory = 1, (DMM[2] = 1)
0 = Immediately applies the clear display-memory command, DMM[2] = 1
1 = Applies the clear display-memory command, DMM[2] = 1, at the next VSYNC time
Auto-Increment Mode
Auto-increment mode increases the speed at which the display memory can be written by
automatically incrementing the character address for each successive character written. This mode
reduces the number of SPI commands, and thus the time needed to write a string of adjacent
characters. This mode is useful when writing strings of characters written from left-to-right, top-to-
bottom, on the display (see Table 5).
0 = Disabled
1 = Enabled
When this bit is enabled for the first time, data in the Display Memory Address (DMAH[0] and
DMAL[7:0]) registers are used as the starting location to which the data is written. When performing
the auto-increment write for the display memory, the 8-bit address is internally generated, and
therefore only 8-bit data is required by the SPI-compatible interface (Figure 21). The content is to
be interpreted as a Character Address byte if DMAH[1] = 0 or a Character Attribute byte if
DMAH[1] = 1. This mode is disabled by writing the escape character 1111 1111.
If the Clear Display Memory bit is set, this bit is reset internally.
a) On power-up
b) Immediately following the rising edge of RESET
c) Immediately following the rising edge of CS after VM0[1] has been set to 1
Display with Integrated EEPROM
Display Memory Mode Register (DMM) (continued)
FUNCTION
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