NJU3503L 데이터 시트보기 (PDF) - Japan Radio Corporation
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NJU3503L Datasheet PDF : 60 Pages
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NJU3503
The serial input or output operation starts when the LSB of the Serial Input / Output control register(PHY1) is
set to "1". In the external clock operation, the serial input or output operation waits to start until the external
clock come in.
When the serial shift register (PHY2) is set the data in advance, the data is output(transmitted) through the
SDO or the SDI(O) terminal. The SDI(O) terminal can be changed as a transmitter or a receiver in
accordance with the bit3(b3) of PHY1. The data order, MSB or LSB first, is selected by the mask option.
Serial Input Output operates as the 3-wire method using SDI(O), SCK and SDO terminals, or the 2-wire using
SDI(O) and SCK terminal.
<<The 3-wire method>>
The data synchronized with the falling edge of the SCK clock is output(transmitted) through the
SDO terminal. The data synchronized with the rising edge of the SCK clock is input(received)
through the SDI(O) terminals.
[ The 3-wire transmission timing chart (MSB first) ]
SCK
OUTPUT
SDO
INPUT
SDI(O)
MSB
DO7
DI7
DO6
DI6
DO5
DI5
DO4
DI4
DO3
DI3
DO2
DI2
DO1
DI1
DO0
LSB
DI0
SERIAL I/O
INTERRUPT
INTERRUPT
<<The 2-wire method>>
SIGNAL START
The data synchronized with the falling edge of the SCK clock is transmitted through the SDI(O)
terminal. The data synchronized with the rising edge of the SCK clock is received through the
SDI(O) terminal.
* In case of the data transmission through the SDI(O) terminal, the SDI(O) terminal must be set as the
output by the condition of the bit3(b3) of the Serial Input / Output control register(PHY1) set to "1". In
case of the data reception through the SDI(O) terminal, the SDI(O) terminal must be set as the input by
the condition of the b3 of PHY1 set to "0".
[ The 2-wire transmission timing chart (LSB first) ]
SCK
OUTPUT
SDI(O)
INPUT
SDI(O)
SERIAL I/O
INTERRUPT
DO0
LSB
DI0
DO1
DI1
DO2
DI2
DO3
DI3
DO4
DI4
DO5
DI5
DO6
DI6
DO7
MSB
DI7
INTERRUPT
SIGNAL START
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