UPD6461GS NEC [NEC], UPD6461GS Datasheet - Page 39

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

4.4 CONTINUOUS INPUT OF COMMAND
as follows.
byte successive command has been transferred, either make CS high once, or transfer 2-byte successive command
end code (FFH:
necessary to make CS high.
4.4.1 When End Code is Not Used
4.4.2 When End Code is Used
Transfer each of the 1-byte, 2-byte, and 2-byte successive commands from a microcontroller to the PD6461, 6462
To transfer a 1-byte or 2-byte command, or a 2-byte successive command with blinking data changed after a 2-
Example 1-byte command
Example 1-byte command
Remark By using the 2-byte successive command end code, the CS pin may remain low. However, it is
DATA
DATA
CLK
CLK
CS
CS
recommended to make CS pin high to improve the noise immunity.
1-byte command
1-byte command
(D0-D7)
(D0-D7)
D7-D0
D7-D0
PD6461/7FH:
2-byte successive
2-byte successive
(D0-D7)
(D0-D7)
1st byte
D15-D8
1st byte
D15-D8
command
command
PD6462) at the end of the 2-byte successive command. In the latter case, it is not
2-byte successive command
2-byte successive command
00H-FEH ( PD6461)
00H-FEH ( PD6461)
00H-7EH ( PD6462)
00H-7EH ( PD6462)
(normal character)
(normal character)
(D8-D15)
(D8-D15)
2nd byte
2nd byte
D7-D0
D7-D0
It is not necessary to make CS low and then back high again.
00H-FEH ( PD6461)
00H-7EH ( PD6462)
Make CS low once and then back high again.
(normal character)
FFH ( PD6461)/
7FH ( PD6462)
(2-byte successive
command end code)
(D8-D15)
(D8-D15)
2nd byte
2nd byte
D7-D0
D7-D0
1-byte command
1-byte command
1-byte command
1-byte command
(D0-D7)
(D0-D7)
D7-D0
D7-D0
MSB first (LSB first)
MSB first (LSB first)
PD6461, 6462
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