UPD16434 NEC, UPD16434 Datasheet - Page 15

• Manufacturer Part Number: UPD16434
• Description: 1/8/ 1/16 DUTY LCD CONTROLLER/DRIVER
• Manufacturer: NEC

(1) 8-time-division (single/multi-chip configuration)
2.5 Data Memory
by the 6-bit binary counter in the data pointer.
the specified data processing mode, and is written into the data memory.
serial/parallel interface.
column driver for driving the LCD. This operation is performed independently from command/data write/read operation
with the CPU, which is performed through the serial/parallel interface. Display data read out operation differs,
depending on the number of time-divisions.
out to the column driver.
located at the Rn and Cm intersection is 1, the corresponding LCD dot is ON. If the data is 0, the dot is OFF.
The data memory is a static RAM configured by two 50-word
The data memory bank is specified by the bank flag in the data pointer, and the address in the bank is specified
The 8-bit data, written to the serial/parallel interface by the CPU, is used for operation or decoded according to
The data memory contents can be directly manipulated by a bit manipulation instruction.
When the
The data memory contents are read out in bit units in synchronization with the row drive signal and are sent to the
Figure 2–6 shows bits correspondence for the row driver and column driver for the data memory. If the data
The contents of the display data in bank 0 or bank 1, whichever is specified by the SMM command, are read
PD16434 is set in the read mode, the data memory contents are output to the CPU through the
Figure 2–5. Data Memory Configuration
00H
31H
00H
31H
Data Sheet S10299EJ4V0DS00
(50 x 8)
(50 x 8)
Bank 0
Bank 1
8-bit banks. It is used for storing display data.
PD16434
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