UPD6461GS NEC [NEC], UPD6461GS Datasheet - Page 30

• Manufacturer Part Number: UPD6461GS
• Description: CMOS LSI CHIP FOR CAMCORDER ON-SCREEN CHARACTER DISPLAY 12 ROWS x 24 COLUMNS
• Manufacturer: NEC [NEC]

30
3.7 WRITE ADDRESS CONTROL COMMAND
(this command is a 2-byte command, requiring 16 bits for each command, even when continuously input).
This command specifies the address at which a character is written in the display area (video RAM) of 12 rows 24 columns
(1) For MSB-first transfer (Command bits are input starting from the MSB (D15).)
(2) For LSB-first transfer (Command bits are input starting from the LSB (D0). The function of each bit is the same as
• Column write address specification bits
• Row write address specification bits
(LSB)
AR3
(MSB)
D0
D15
that for MSB-first transfer.)
1
The display area has 24 columns. These bits are used to specify the column in which a character is to be written.
The display area has 12 rows. These bits are used to specify the row in which a character is to be written.
D1
0
D14
0
D2
D13
0
0
D3
D12
1
0
D11
D4
0
1
D10
D5
0
0
D9
D6
0
0
AR3
D8
D7
1
AC4
Any other value is invalid.
0
0
1
AR2
D7
AC0
AC3
AR3
D8
0
0
0
0
0
1
Any other value is invalid.
AC2
AR2
AR1
D6
0
0
0
1
0
0
AC1
D9
Column address specification bits
AC1
AR1
0
0
1
Column address specification bits
0
0
1
AR0
D5
D10
AC2
AC0
AR0
0
1
1
0
1
1
AC4
D4
AC3
D11
Row address specification bits
AC3
D3
D12
AR4
Column 23
Column 0
Column 1
Column
Row 11
AC2
Row 0
Row 1
D2
Row
PD6461, 6462
D13
AR0
AC1
D1
AR1
D14
AC0
(LSB)
D0
(MSB)
D15
AR2