ncp1840 ON Semiconductor, ncp1840 Datasheet - Page 5

• Manufacturer Part Number: ncp1840
• Description: High Current, 8-output Led Driver
• Manufacturer: ON Semiconductor

S TAR T
CONTROL BITS: A
REGISTER ADDRESS:
CB2
A4
0
0
0
0
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
0
1
0
2
1
CB1
Par t Address
3
A3
0
0
1
1
0
0
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
1
4
0
5
1
CB0
6
A2
0
1
0
1
0
1
0
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
7
WRITE
0
8
Turn ULEDx ON/OFF according to data programmed to ULED1-8 OUTPUT CONTROL REG
Programming registers. There will be a third byte with data for the address defined by A[4:0]
Programming registers. Turn the outputs active at the end of the third byte.
Program ALL Current Level Registers with third byte data value
Program ALL PWM Registers with third byte data value
Reserved
Reserved
Reserved
ACK
A1
9
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
Control Bi ts
1
0
2
1
A0
3
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
A4
4
Re gi st er Address
A3
5
A2
ADD-Dec
6
A1
10
11
12
13
14
15
16
17
7
0
1
2
3
4
5
6
7
8
9
http://onsemi.com
A0
8
Figure 3.
ACK
9
S TAR T
5
ADD-Hex
0
1
10
11
A
B
C
D
E
0
1
2
3
4
5
6
7
8
9
F
0
2
1
Par t Address
3
Function
1
4
0
5
ULED1 – current level register address
ULED2 – current level register address
ULED3 – current level register address
ULED4 – current level register address
ULED5 – current level register address
ULED6 – current level register address
ULED7 – current level register address
ULED8 – current level register address
ULED1 – PWM register address
ULED2 – PWM register address
ULED3 – PWM register address
ULED4 – PWM register address
ULED5 – PWM register address
ULED6 – PWM register address
ULED7 – PWM register address
ULED8 – PWM register address
ULED 1-8 output control register address
Main Status register
1
6
1
7
READ
1
8
ACK
9
B7
1
B6
Function
2
B5
3
Re gi st er Data Out
B4
4
A3
5
A2
6
A1
7
A0
8
ACK
9
S T OP