文档介绍：WORD格式整理版
概述
本核心板是以 MT2503 为平台，此芯片高度集成了 GPS、 BT、PMIC。其中 MT2503D 是内部集成了 32M
的 RAM 与 32M
WORD格式整理版
核心板引脚描述
类型缩写表
缩写
描述
AI
Alog input
AO
Analog output
AIO
Analog bi-dirction
DI
Digital input
DO
Digital output
DIO
Digital bi-direction
P
Power
G
Ground
表 2-1
Pin NO
Pin name
Type
Description
Power domain
1
SPK_OUTP
AO
Positive output of internal speaker amp
VBAT
2
SPK_OUTN
AO
negative output of internal speaker amp
VBAT
3
MICP0
AI
Microphone channel0 positive input
MICBIAS0
4
MICN0
AI
Microphone channel0 negative input
MICBIAS0
5
MICBIAS0
P
Microphone Bias source 0
MICBIAS0
6
RESETB
DI
System Reset
DVDD18_EMI
7
LSCE_B
DO
Serial display interface chip select output
DVDD18_EMI
8
LSA0
DO
Serial display interface address
DVDD18_EMI
9
LSDA
DIO
Serial display interface data
DVDD18_EMI
10
LSCK
DO
Serial display interface clock
DVDD18_EMI
11
LPTE
DIO
Serial display tearing signal
DVDD18_EMI
12
LSRSTB
DO
Serial display interface reset
DVDD18_EMI
13
USB_DP
DIO
D+ data input/output
14
USB_DM
DIO
D- data input/output
15
VSIM1
P
LDO output for SIM1
VBAT
WORD格式整理版
16
SIM1_SIO
DIO
SIM1 data input/output
VSIM1
17
SIM1_SRST
DO
SIM1 Card reset output
VSIM1
18
SIM1_SCLK
DO
SIM1 Card clock output
19
GND
G
Ground
20
GPS_ANT
AI
GPS RF antenna
21
GND
G
Ground
22
WIFI_MCDA0
DIO
SD Serial data IO 0
DVDD33_MSDC
Memory stick serial data 0
23
WIFI_MCDA3
DIO
SD Serial data IO 3
DVDD33_MSDC
Memory stick serial data 3
24
WIFI_MCDA2
DIO
SD Serial data IO 2
DVDD33_MSDC
Memory stick serial data 2
25
WIFI_MCCM0
DO
SD Command output
DVDD33_MSDC
Mem