UPD16431A NEC, UPD16431A Datasheet - Page 5

• Manufacturer Part Number: UPD16431A
• Description: 1/2/ 1/3/ 1/4-DUTY LCD CONTROLLER/DRIVER
• Manufacturer: NEC

CONFIGURATION OF SHIFT REGISTER
of input data are recognized as a command and are sent to the command register, and the 9th bit and those
that follow are recognized as display data and are sent to the display register.
CONFIGURATION OF OUTPUT LATCH
Two shift registers, an 8-bit command register and a 56-bit display register, are provided. The first 8 bits
The meaning of the display data is as follows:
Be sure to transfer 56 bits of display data.
Note Bits b3 and b4 of status command (Refer to page 8.)
LCD: 0
LED: 0
MSB
MSB
SEG
SEG
SEG
SEG
on, 1
off, 1
56
56
56
56
SEG
/LED
/LED
/LED
/LED
56
/LED
8
8
8
8
off
on
8
Display data (LCD, LED)
56-bit shift register
MSB
8-bit shift register
b7
Command
SEG
SEG
SEG
SEG
LSB
1
1
1
1
SEG
b0
COM
COM
COM
COM
1
LSB
LSB
1
2
3
4
(latch address
(latch address
(latch address
(latch address
Transfer direction
Note
Note
Note
Note
PD16431A
: 00)
: 01)
: 10)
: 11)
5