User's Manual

Xin Zhong Xin Technology Co., Ltd.
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Company：SHENZHENSHIXINZHONGXIN TECHNOLOGY CO., LTD.
Tel ：[phone]，FAX: [phone]
Address：F5, Block C, Zhuangbian Industrial Park, Hangcheng Rd.,Xixiang Town, Bao’an District, Shenzhen City, Guangdong
Province, China
Website：www.c-chip.com.cn
六、Pin function
Pin Symb I/O Description
1 PIO1 Bi-Directional TX EN
2 PIO2 Bi-Directional Speaker output positive (left side)
3 VOL+ Bi-Directional Speaker output negative (right side)
4 VOL- Bi-Directional Speaker output positive (right side)
5 UP Bi-Directional Ground
6 DOWN Bi-directional Programmable input/output line
7 POWER Bi-directional Programmable input/output line
8 +1.8V POWER +1.8V Supply
9 GND Bi-directional Programmable input/output line
10 BAT Battery terminal+ve 3.3-4.2V
11 LED1 CMOS Input Synchronous Data Input
12 LED2 pen drain output Synchronous Data Sync
13 MIC pen drain output Synchronous Data Clock
14 SPBN Analogue output Speaker output L negative
15 SPBP Analogue output Speaker output L positive
16 SPAN Analogue output Speaker output R Nositive
17 SPAP Analogue output Speaker output R Positive
18 GND GND Ground
19 MOSI CMOS input with weak
internal pull-down
Serial peripheral interface data
input
20 CLK CMOS input with weak
internal pull-down
Serial peripheral interface clock
21 CS# CMOS input with weak
internal pull-down
Chip select for serial peripheral
interface, active low
22 MISO CMOS input with weak
internal pull-down
Serial peripheral interface data
Output
23 RTS CMOSoutput,tri-state,with
week pull-up
UART request to send active low
24 VDD-CHG Charger input Lithium iion/polymer battery
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