NHD-12864EZ-FL-YBW Newhaven Display, NHD-12864EZ-FL-YBW Datasheet - Page 13

• Manufacturer Part Number: NHD-12864EZ-FL-YBW
• Description: LCD MOD GRAPH 128X64 Y/G TRANSFL
• Manufacturer: Newhaven Display

Specifications of NHD-12864EZ-FL-YBW

• Display Type: LCD - Monochrome
• Display Mode: Transflective
• Viewing Area: 72.00mm L x 40.00mm W
• Backlight: LED - Yellow/Green
• Dot Size: 0.48mm W x 0.48mm H
• Dot Pitch: 0.52mm x 0.52mm
• Dot Pixels: 128 x 64
• Interface: Serial
• Pixel Density: 128 x 64
• Fluid Type: STN
• Module Size (w X H X T): 93 mm x 70 mm x 13 mm
• Viewing Area (w X H): 72 mm x 40 mm
• Backlighting: LED
• Background Color: Green, Yellow
• Operating Temperature Range: - 20 C to + 70 C
• Attached Touch Screen: No
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

NHD-12864EZ
The LCM enters serial mode when the J8 is set low. A two-line clock synchronous transfer
method is used. The LCM receives serial input data(SID) by synchronizing with a transfer
clock(SCLK) sent from the master side.
When the MPU interfaces with several LCD MODULES, chip select pin(CS) must be used. The transfer
clock(SCLK) input is activated by making chip select(CS) high. In addition, the transfer counter of the
LCM can be reset and serial transfer synchronized by making chip select(CS) low. Here, since the
data which was being sent at reset is cleared, restart the transfer from the first bit of this data. In a
minimum system where a single LCM interfaces to a single MPU, an interface can be constructed
from the transfer clock(SCLK) and serial input data(SID). In this case, chip select(CS) should be fixed
to high.
The transfer clock(SCLK) is independent of operational clock of the LCM. However, when several
instructions are continuously transferred, the instruction execution time determined by the operational
clock must be considered since the LCM does not have an internal transmit/receive buffer.
Following figure shows the basic procedure for transferring serial data. To begin with, transfer the start
byte. By receiving five consecutive bits of 1(synchronizing bit string) at the beginning of the start byte,
the transfer counter of the LCM is reset and serial transfer is synchronized. The 2 bits following the
synchronizing bit string(5 bits) specify transfer direction(RW bit) and register select(RS bit). Be sure to
transfer 0 in the 8 th bit.
After receiving the start synchronizing bit string, the RW bit(=0), and RS bit in the start byte, an 8-bit
instruction is received in 2 bytes: the higher 4 bits of the instruction are placed in the LSB of the first
byte, and the lower 4 bits of the instruction are placed in the LSB of the second byte. Be sure to transfer
0 in the following 4 bits of each byte.
Newhaven Display International, LLC
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