1. Mokwon University
Yong Heui CHO(조용희)
yhcho@mu.ac.kr
What is a Smartphone?

2. Definition
 Smartphone
 Mobile phone + computer + sensors +
wireless I/O
 Mobile OS: speed vs. battery life
2
←inbritech.com

3. Computer of Tomorrow
Devoid of CPU and memory
3

4. Smartphone HW: AP
 Application Platform Chip
 AP: Application Processor
 Flash memory
 Mobile Dynamic RAM
 PMU: Power Management Unit
 Audio Codec
 Bluetooth
 WiFi
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5. Smartphone HW: CP
 Connectivity Platform Chip
 CPU: Central Processing Unit
 DSP: Digital Signal Processing
 RF baseband processing
 Voice processing
 PA: Power Amplifier
 Tx-Rx switch
 DAC + ADC
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6. Openmoko Project
 Open source mobile phone project
UART: Universal Asynchronous Rx/Tx
SDIO: Secure Digital I/O
GPIO: General Purpose I/O
I2C: Inter-Integrated Circuit
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7. Apple iPhone 4S
 Apple released iPhone 4S in Oct. 2011.
 A5: powerful and faster than A4
 Twin antenna: diversity
7 ←techrepublic.com

8. Breakdown of iPhone 4S
Without battery
EMI Shield
←ifixit.com
Mother-Board
8

9. Samsung Galaxy S III
 Samsung released Galaxy S III in May 2012.
 Quad-core A9 processor
9 ←techrepublic.com

10. Breakdown of Galaxy S III
10