NJU6624C New Japan Radio, NJU6624C Datasheet - Page 20

• Manufacturer Part Number: NJU6624C
• Description: 14-CHARACTER 1-LINE DOT MATRIX LCD CONTROLLER DRIVER with SMOOTH SCROLL FUNCTION
• Manufacturer: New Japan Radio

(6)Interface with MPU
(6)Interface with MPU
The instructions and data are communicated with the serial port which is a clock synchronization type based on
The instructions and data are communicated with the serial port which is a clock synchronization type based on
16-bit per word.
16-bit per word.
The NJU6624C can be controlled by the serial data as shown below.
The NJU6624C can be controlled by the serial data as shown below.
CS
CS
SCL
SCL
DATA
DATA
The serial interface circuit operates in CS=L.
The serial interface circuit operates in CS=L.
A communication unit consists of 16-bit data. The communication period is from the falling edge of CS terminal to
A communication unit consists of 16-bit data. The communication period is from the falling edge of CS terminal to
the rising edge. The inputs data and latched at rising edge of shift clock (SCL) and the first 16-bit data are fetched
the rising edge. The inputs data and latched at rising edge of shift clock (SCL) and the first 16-bit data are fetched
into the NJU6624C at the rising edge of chip select (CS). The data over than 16 bits are ignored. If the input data
into the NJU6624C at the rising edge of chip select (CS). The data over than 16 bits are ignored. If the input data
are less than 16 bits,they are ignored at the rising edge of "CS". Therefore,just 16 bits data should be input for the
are less than 16 bits,they are ignored at the rising edge of "CS". Therefore,just 16 bits data should be input for the
correct communication. In case of RAM data input, the RAM address is changed automatically
correct communication. In case of RAM data input, the RAM address is changed automatically
as increment or decrement.
as increment or decrement.
The data to input is MSB first. Although the output data is just only key scan, data bits D8 to D15 in the key data
The data to input is MSB first. Although the output data is just only key scan, data bits D8 to D15 in the key data
read out instruction are input. After these 8-bit instruction is input, this serial data input terminal is changed to the
read out instruction are input. After these 8-bit instruction is input, this serial data input terminal is changed to the
output terminal at the 8th falling edge of SCL clock.
output terminal at the 8th falling edge of SCL clock.
The electrical short between the NJU6624C and external circuit must be prevented in the application.
The electrical short between the NJU6624C and external circuit must be prevented in the application.
NJU6624C
NJU6624C