UPD6462 NEC, UPD6462 Datasheet - Page 35

• Manufacturer Part Number: UPD6462
• Description: CMOS LSI CHIP FOR CAMCORDER ON-SCREEN CHARACTER DISPLAY 12 ROWS x 24 COLUMNS
• Manufacturer: NEC

3.11 TEST MODE COMMAND
the TEST pin (pin 9) is connected to ground.
3.12 DISPLAYED CHARACTER CONTROL COMMAND
When inputting this command, ensure that LC oscillator is turned on (if the LC oscillator is turned off, it is not possible to
write to video RAM).
for a pattern), you need input only the eight low-order bits (D0 to D7) of the command for the second and subsequent
characters. In this case, the write column address is automatically incremented (After a character has been written into
column 23, the next character is automatically written into left-most column 0 of the next row. When a character is written
into column 23 of row 11, the next character is automatically written into column 0 of row 0.).
Column address ( )
Row n
Row address
Row n+1
This command is used only to test the IC. Usually, do not input this command. The system cannot enter test mode while
(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
This command specifies the attributes of each character, including the character pattern, color, and whether it is blinked.
This command is a 2-byte continuous command. When continuously writing characters with the same attributes (except
(MSB)
(LSB)
D15
D0
T8
1
that for MSB-first transfer.)
D14
D1
0
0
( )
D13
D2
1
0
0
0
D12
1
D3
1
1
0
2
2
D11
D4
0
1
• • • • • • • • • • • •
• • • • • • • • • • • •
D10
D5
0
1
D9
D6
0
0
D8
D7
T8
1
Row address incremented
21
21
D7
D8
T7
T0
22
22
D6
D9
T6
T1
23
23
D10
D5
T5
T2
D11
D4
T4
T3
D12
D3
T3
T4
PD6461, 6462
D13
D2
T2
T5
D14
D1
T1
T6
(MSB)
(LSB)
D15
D0
T0
T7
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