NJU6676 New Japan Radio Co., Ltd., NJU6676 Datasheet - Page 18

• Manufacturer Part Number: NJU6676
• Description: 64-Common x 132-Segment plus 1-Icon Bit Map Type LCD Controller and Driver
• Manufacturer: New Japan Radio Co., Ltd.

3-4) Column address set
As above-mentioned, in order to access to the DDRAM for writing or reading display data, it is
necessary to execute both “page address set” and “column address set” before accessing. The 8-bit
column address data will be valid when both upper 4-bit and lower 4-bit data are set into the column
address register.
Once the column address is set, it will automatically increment (+1) whenever the DDRAM will be
accessed, so that the DDRAM will be able to be continuously accessed without “column address set”
instruction.
The column address will stop increment and the page address will not be changed when the last
address (83)H is addressed.
3-5) Status read
This instruction reads out the internal status regarding “busy flag”, “ADC select”, “display on/off ” and
“reset”.
BUSY : When D7 is “1”, the LSI is being busy and can’t accept any instructions.
ADC
On/Off : It shows display on or off status.
RESET : It shows reset status.
A0
A0
0
0
RD
RD
1
0
: It shows the correspondence between the column address and segment drivers.
When D6 is “1”, the column address (n) corresponds to segment driver n.
When D5 is “0”, the LSI is in display-on status.
When D5 is “1”, the LSI is in display-off status.
When D4 is “0”, the LSI is in normal operation.
When D4 is “1”, the LSI is during reset operation.
When D6 is “0”, the column address (131-n) corresponds to segment driver n.
Please be careful that read out data is opposite of “ADC select” instruction data.
Please be careful that read out data is opposite of “ADC select” instruction data.
WR
WR
0
1
D7
A7
BUSY
0
0
0
1
1
:
D7
D6
A6
0
0
0
0
0
:
ADC
D6
D5
A5
0
0
0
0
0
:
On/Off
D4
A4
D5
1
0
0
0
0
0
:
D3
A7
A3
A3
0
0
0
0
:
RESET
D4
D2
A6
A2
A2
0
0
0
0
:
D3
D1
A5
A1
A1
0
0
0
1
1
:
D0
A4
A0
A0
0
1
0
1
:
D2
0
Upper 4-bit
Lower 4-bit
D1
0
Column address
PRELIMINARY
130
131
D0
NJU6676
0
0
1
: