NJU26125VC2 NJRC [New Japan Radio], NJU26125VC2 Datasheet - Page 15

• Manufacturer Part Number: NJU26125VC2
• Description: Seat Positioning Surround Decoder
• Manufacturer: NJRC [New Japan Radio]

Ver.2010-07-01
■
■
I
Host Interface
2
The NJU26125 can be controlled via Serial Host Interface (SHI) using I
packets (1 byte) when using either format. Refer to serial Host Interface Pin Description.(Table 12)
Table 12 Serial Host Interface Pin Description
Note : SDA pin (No.22) is a bi-directional open drain terminal. This pin requires a pull-up resister.
AD1 (No.16) pin is input pin with pull-down. AD1 (No.16) pin is connected with V
resistance.
When NJU26125 is stopped by power supply VDD, SDA pin and SCL pin become Hi-Z. But these pins are not
5V tolerant when VDD stops.
C bus
I
drain
AD1 pin is used to configure the seven-bit SLAVE address of the serial host interface. (Table 13) This offers
additional flexibility to a system design by two different SLAVE addresses of the NJU26125. An address can be
arbitrarily set up by the AD1 pin. The I
2
C bus interface transfers data to the SDA pin and clocks data to the SCL pin. SDA pin is a bi-directional open
Table 13 I
and
requires a pull-up resister.
bit7
0
0
* SLAVE address is 0 when AD1 is “Low”. SLAVE address is 1 when AD1 is “High”.
* SLAVE address is 0 when R/W is “W”. SLAVE address is 1 when R/W is “R”.
2
Start
C bus SLAVE Address
bit
Pin No.
16
22
23
bit6
0
0
bit5
(I
1
1
Symbol
2
2
C address of AD1 is decided by connection of AD1 pin.
Slave Address ( 7bit )
SDA
C bus)
AD1
SCL
bit4
1
1
I
Serial Data Input/Output
Serial Clock
2
C bus address Bit
bit3
1
1
(Open Drain Input/Output)
I
2
C bus Format
bit2
0
0
2
C bus. Data transfers are in 8 bit
R/W
bit
AD1
bit1
0
1
DD
ACK
or V
NJU26125
R/W
R/W
SS
bit0
through 3.3k
- 15 -
Ω