UPD16432B NEC, UPD16432B Datasheet - Page 29

• Manufacturer Part Number: UPD16432B
• Description: 1/8/ 1/15 DUTY LCD CONTROLLER/DRIVER
• Manufacturer: NEC

3.
Key Data Read
(1) Flowchart
(2) Timing chart
Cautions 1. Wait time t
KEY REQ
KEY REQ
DATA
DATA
SCK
SCK
STB
STB
To next processing
2. KEY REQ does not become low until the key data is all “0”.
KEY REQ = H?
Key data read
All data read?
YES
KEY REQ
recognition
Wait OK?
Key data
until the fall of the 1st shift clock of data 1.
(It is not synchronized with the key data reads.)
Start
YES
YES
Command 1
Data 4
WAIT
NO
NO
NO
(1 s) is necessary from the rise of the 8th shift clock of command 1
t
WAIT
Data setting command (command 1)
MSB
Wait time: 1 s
0
Data 1
1
0
0
0
Data 2
1
0
LSB
0
(Key data)
Data 3
PD16432B
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