UPD16434G-001-12 View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD16434G-001-12

1/8/ 1/15 DUTY LCD CONTROLLER/DRIVER

NEC => Renesas Technology 

µ PD16434

2.4 Data Pointer

The data pointer consists of a 6-bit binary counter (DP5 to DP0) and 1-bit bank flag (BNKF). It specifies the data

memory address.

Figure2–4. Data Pointer Organization

6-bit binary counter

BNKF

DP5 DP4 DP3 DP2 DP1 DP0

The contents of the bank flag and the 6-bit binary counter are set simultaneously by the immediate data from the

LDPI command.

The bank flag contents specify the data memory bank (BNKF=0 : Bank 0, BNKF=1 : Bank 1), and the 6-bit binary

counter contents specify the address (00H to 31H) in the bank specified by the bank flag. The 6-bit binary counter is an

up/down counter. Its contents are modified (+1, −1, or held) each time a read, write, or AND operation is performed, or

an 8-bit data is input/output in the OR mode, according to the specifications for each mode setting command.

When the BSET or BRESET command is executed, the 6-bit binary counter contents are modified (+1, −1, or

held) each time according to the command specification.

In addition, in the character mode, the 6-bit binary counter contents are modified (+5, −5) each time an 8-bit data

is input or a cursor processing command is executed.

Remark The 6-bit binary counter value can exceed the limit of the data memory address space. For example, if

the 6-bit binary counter is decremented (−1) from 00H, the value will be 3FH, or it is incremented (+1)

from 31H, the value will be 32H. However, the data memory will perform nothing for the command

specifying an address from 32H to 3FH.

14

Data Sheet S10299EJ4V0DS00

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