UPD161622 NEC, UPD161622 Datasheet - Page 15

• Manufacturer Part Number: UPD161622
• Description: 396 OUTPUT TFT-LCD SOURCE DRIVER
• Manufacturer: NEC

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(R5) to select the length of the data to be transmitted as either 16 bits (BMD = 0) or 8 bits (BMD = 1). This setting is
valid for the display data written as DR data to the display memory register (R12).
(1) Commands other than those of the display memory register (R12)
BMD = 1 (8-bit data bus)
BMD = 0 (16-bit data bus)
Note 0 or 1
(2) Display memory register (R12)
BMD = 1 (8-bit data bus)
BMD = 0 (16-bit data bus)
Moreover, when using the parallel interface, it is possible to use the BMD flag (D
The relationship between the command input and the data bus length is as follows.
Pin
Data
Pin
Data
Pin
Data
Pin
Data
Commands other than those of the display memory register (R12) are executed in 1-byte units regardless of
the value of BMD (bus length setting flag in data access control register (R5)).
Display memory register (R12) commands are executed in 1-byte units when BMD = 1, and in 1-word units
when BMD = 0.
Note
D
D
D
D
D
D
D
15
15
15
7
7
7
7
Note
D
D
D
D
D
D
D
14
14
14
6
6
6
6
Note
D
D
D
D
D
D
D
13
13
13
5
5
5
5
Note
D
D
D
D
D
D
D
12
12
12
4
4
4
4
D
D
Note
D
D
D
D
D
11
11
11
3
3
3
3
D
D
Note
D
D
D
D
D
10
10
10
2
2
2
2
Data Sheet S15649EJ2V0DS
Note
D
D
D
D
D
D
D
9
9
1
1
9
1
1
D
D
Note
D
D
D
D
D
8
8
0
0
8
0
0
D
D
D
D
7
7
7
7
D
D
D
D
6
6
6
6
D
D
D
D
5
5
5
5
7
of the data access control register
D
D
D
D
4
4
4
4
D
D
3
3
D
D
3
3
D
D
2
2
D
D
2
2
PD161622
D
D
1
1
D
D
1
1
D
D
0
0
D
D
0
0
15