NJU6676 New Japan Radio Co., Ltd., NJU6676 Datasheet - Page 29

• 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.

(5) MPU interface
(5-1) Interface type selection
NJU6676 interfaces with MPU by 8-bit bidirectional data bus (D7 to D0) or serial (SI:D7). The 8 bit
parallel or serial interface is determined by a condition of the P/S terminal connecting to "H" or "L"
level as shown in Table 4. In case of the serial interface, status and RAM data read out operation is
impossible.
(5-2) Parallel Interface
The NJU6676 interfaces to 68 or 80 type MPU directly when the parallel interface (P/S="H") is
selected. 68 type MPU or 80 is determined by the condition of C86 terminal connecting to "H" or "L"
as shown in table 5.
(5-3) Discrimination of Data Bus Signal
The NJU6676 discriminates the mean of signal on the data bus by the combination of A0, E, R/W,
and (RD,WR) signals as shown in Table 6.
P/S
Common
C86
A0
H
H
L
L
1
1
0
0
68 type
R/W
68 type MPU
80 type MPU
Parallel
1
0
1
0
Serial
Type
Type
RD
0
1
0
1
80 type
CS1
CS1
CS1
WR
CS1
CS1
CS1
1
0
1
0
A0
A0
A0
Read Display Data
Write Display Data
Status Read
Write into the Register(Instruction)
A0
A0
A0
RD
RD
Table4
-
RD
RD
E
Table 5
Table 6
WR
WR
-
Function
R/W
WR
WR
C86
C86
-
SI(D7)
D0 D7
D0 D7
D0 D7
D7
SI
“-“ : They should be fixed to “H” or “L”.
SCL(D6
SCL
D6
)
D0 D5
D0 D5
PRELIMINARY
Hi - z
NJU6676