User's Manual

20 PIO[5]
Bi-directional with pro
g
rammable stren
g
th internal
pull-up/down
Programmable input/output line
21 PIO[4]
Bi-directional with pro
g
rammable stren
g
th internal
pull-up/down
Programmable input/output line
22 PCM_IN CMOS input, with weak internal pull-down Synchronous data input
23 PCM_CLK Bi-directional with weak internal pull-down Synchronous data clock
24 PCM_OUT
CMOS output, tri-state, with weak internal
pull-down
Synchronous data output
25 PCM_SYNC Bi-directional with weak internal pull-down Synchronous data sync
26 SPI_MOSI CMOS input, with weak internal pull-down SPI data input
27 SPI_CLK Input with weak internal pull-down SPI clock
28 SPI_CSB Input with weak internal pull-up
Chip select for Serial Peripheral Interface
(SPI),active low
29 SPI_MISO
CMOS output, tri-state, with weak internal
pull-down
SPI data output
30 LED[0] Open drain output LED driver
31 LED[1] Open drain output LED driver
32
V
REGIN_H Re
g
ulator input
Input to internal hi
g
h-voltage linear regulator
(
2.5V~4.9V
)
33
V
REGEN_H
A
nalo
g
ue
T
ake hi
g
h to enable hi
g
h-voltage linear regulator
a
nd switch-mode regulator
34
V
REGOUT_H Suppl
y
Hi
g
h-voltage linear regulator output (1.8V out)
35 N.C. N.C. Leave unconnected
36 GND Ground Di
g
ital Ground
37
V
DD_CHG Char
g
er input
Lithium ion/pol
y
mer batter
y
char
g
er input
(
4.5V~6.5V
)
38
V
DD_BAT Batter
y
terminal +ve
Lithium ion/pol
y
mer batter
y
positive terminal.
Batter
y
char
g
er output and input to switch-mode
re
g
ulator
(
4.2V out
)
39 GND Ground Di
g
ital Ground
40 MIC_BIAS
A
nalo
g
ue Microphone bias
41 MIC_R_P
A
nalo
g
ue Microphone input positive, right
42 MIC_R_N
A
nalo
g
ue Microphone input ne
g
ative, ri
g
ht
43 MIC_L_P
A
nalo
g
ue Microphone input positive, left
44 MIC_L_N
A
nalo
g
ue Microphone input ne
g
ative, left
45
A
GND Ground
A
nalo
g
ue Ground