NJU6635 New Japan Radio Co.,Ltd, NJU6635 Datasheet - Page 24
NJU6635
Manufacturer Part Number
NJU6635
Description
16-character 2-line Dot Matrix Lcd Controller Driver
Manufacturer
New Japan Radio Co.,Ltd
Datasheet
1.NJU6635.pdf
(33 pages)
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(5-2)4-bit MPU interface
Internal
Status
(DB
transfer.
lower 4-bit (the data DB
this case the data of busy flag and address counter are also output twice.
RS
R/W
E
DB
DB
DB
DB
RS
R/W
E
DB
When the interface length is 4-bit, the data transfer is performed by 4 lines connected to DB
The data transfer is executed in the sequence of upper 4-bit (the data DB
The busy flag check must be executed after two-time 4-bit data transfer (1 instruction execution). In
7
6
5
4
0
7
to DB
Writing Instruction into
Instruction Register (IR)
3
Instruction
Writing
are not used). The data transfer with the MPU is completed by the two-time 4-bit data
IR
IR
IR 7
IR 6
IR 5
IR 4
0
to DB
Operation
IR 3
IR 2
IR 1
3
IR 0
Busy Flag
Check
Busy
at 8-bit length).
AC
Readout Busy Flag(BF)
and Address counter(AC)
BF
BF
BF
BF
No
Busy
Busy Flag
Check
AC
AC 3
AC 2
AC 1
AC 0
D
7
Instruction
Writing
Reading data Register (DR)
D
DR 7
DR 6
DR 5
DR 4
3
4
to DB
7
NJU6635
at 8-bit length) and
DR 3
DR 2
DR 1
DR 0
4
to DB
7
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