MC144032B6WCB-SPTLY Midas, MC144032B6WCB-SPTLY Datasheet - Page 14

• Manufacturer Part Number: MC144032B6WCB-SPTLY
• Description: LCD, 144X32, STN, Y/GN B/L, CHINESE; Backlighting Colour: Yellow Green; LCD Display Type: STN; Pixel Size (H x W): 0....
• Manufacturer: Midas

Parallel interface
ST7920 is in parallel mode by pulling up PSB pin. And can select 8 bit or 4-bit bus interface by
function set instruction DL control bit. MPU can control ( RS , RW , E , and DB0..DB7 ) pins to
complete the data transmission.
In 4-bit transfer mode, every 8 bits data or instruction is separated into 2 parts. Higher 4 bits
DB7~DB4 data will transfer.
First and placed into data pins (DB7~DB4). Lower 4 bits (DB3~DB0) data will transfer second
and placed into data pins (DB7~DB4). (DB3~DB0) data pins are not used.
Timing Diagram of 8-bit Parallel Bus Mode Data Transfer
Timing Diagram of 4-bit Parallel Bus Mode Data Transfer