User's Manual

M80 Hardware Design
M80_HD_V1.2 - 28 -
0.2×SIM1_VDD
VOHmin=
0.9×SIM1_VDD
SIM1_GND
52
SIM ground
SIM_
PRESENCE
57
I
SIM card detection
VILmin=0V
VILmax=
0.25×VDD_EXT
VIHmin=
0.75×VDD_EXT
VIHmax=
VDD_EXT+0.3
If unused, keep
these pins open.
ADC
PIN NAME
PIN
NO.
I/O
DESCRIPTION
DC
CHARACTERISTICS
COMMENT
ADC0
2
I
General purpose
analog to digital
converter.
Voltage range: 0V to
2.8V
If unused, keep
these pins open.
ADC1
1
I
General purpose
analog to digital
converter.
Voltage range: 0V to
2.8V
If unused, keep
these pins open.
PCM
PIN NAME
PIN
NO.
I/O
DESCRIPTION
DC
CHARACTERISTICS
COMMENT
PCM_CLK
19
O
PCM clock
VILmin=0V
VILmax=
0.25×VDD_EXT
VIHmin=
0.75×VDD_EXT
VIHmax=
VDD_EXT+0.3
VOHmin=
0.85×VDD_EXT
VOLmax=
0.15×VDD_EXT
PCM_IN
18
I
PCM data input
PCM_OUT
20
O
PCM data output
PCM_SYNC
21
O
PCM frame
synchronization
SD card
PIN NAME
PIN
NO.
I/O
DESCRIPTION
DC
CHARACTERISTICS
COMMENT
SD_CMD
34
O
SD command
VILmin=0V
VILmax=
0.25×VDD_EXT
VIHmin=
0.75×VDD_EXT
VIHmax=
SD_CLK
35
O
SD clock
SD_DATA0
36
I/O
SD data