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UM10
503
Al
l i
n
for
m
at
ion
pr
ovi
ded
in
this
do
cum
ent i
s
sub
jec
t to
leg
a
l d
is
c
la
im
er
s.
©
NXP
B.V
. 2015.
Al
l r
ig
h
ts
r
e
s
e
rv
ed.
User m
anu
al
Rev
.
2.1 — 10 D
ecemb
er 2015
1215 of
1441
N
X
P Semi
conductor
s
UM10503
Cha
pte
r 44:
LPC4
3xx
/LPC4
3
Sxx
I2
S int
e
rf
ace
CREG6 bits 12 and 13 select PLL0AUDIO for the I2S0 interface. CREG bits 14 and 15 select BASE_AUDIO_CLK for the I2S1 interface.
Fig 147. I2S clocking and pin connections
I
2
S
peripheral
block
TXMODE[1:0]
TXMODE[2]
0
1
1
0
RXMODE[2]
TX_SCK
RX_SCK
(1 to 64)
(1 to 64)
TX_MCLK
10
00
8-bit
Fractional
Rate Divider
X
Y
TXRATE[15:8]
TXRATE[7:0]
1
0
TXBITRATE[5:0]
RX_MCLK
8-bit
Fractional
Rate Divider
X
Y
DAI[5]
TXRATE[15:8]
TXRATE[7:0]
01
10
RXMODE[1:0]
RXBITRATE[5:0]
TXMODE[2]
0
1
1
0
RXMODE[2]
TX_WS
RX_WS
DAO[5]
Pin OEn
I2S_RX_WS
DAI[5]
Pin OEn
I2S_RX_SDA
I2S_RX_MCLK
RXMODE[3]
I2S_RX_SCK
Pin OE
I2S_TX_WS
I2S_TX_SDA
I2S_TX_MCLK
TXMODE[3]
Pin OE
I2S_TX_SCK
0
1
01
DAO[5]
0
1
CREG6[12]
0
1
00
0
1
CREG6[13]
0
1
PCLK
BASE_AUDIO_CLK
BASE_AUDIO_CLK