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Circuit Description
In the Wrting process, WEn is fallen to low and it enables writing process to operate. During reading
process, OEn is fallen to low and it enables reading process to operate. Each chip select signals in
the PCF5213 choose different memories.
DPRAM Memory(UME401:70P248L55BYI) - 4Kx16 dual port RAM
It is accessed by Phone and PDA, but not accessed simultaneously.
Generally, Instructions and data used by Phone and PDA are stored.
Clock(TCX101:TCO-5871U 26MHz)
This system uses the 26MHz TCXO, TCO-5871U, Toyocom. AFC control signal form PCF5213
controls frequency from 26MHz x-tal. It generates the clock frequency. This clock is connected to
PCF5213 (UCP201) and UAA3587(U102).
2-2-3. Audio Part
EAR1 and EAR2 from PCF5213 are connected to the main speaker and receiver via Audio
Codec(WM9712). MIC_P and MIC_N are connected to the main MIC as well.
2-2-4. PDA PART
The PDA logic part consists of power supply part, MPU & memory part, LCD part, audio part
and all the peripherals.
⑴
POWER SUPPLY
When the battery is inserted to the handset,
VBAT makes VCC_BATT, VCORE14, VPLL13, VSRAM11 via U604(MAX1587) which is a CPU
voltage
VCC30 via U604(MAX1587) which is CPU & peripheral voltage,
VMODOC30 via U619(AS1352-C0CF) which is a M-DOC memory voltage,
VDPRAM18 via U619(AS1352-C0CF) which is a DPRAM voltage,
VAUDIO30 via U619(AS1352-C0CF) which is a Audio Codec voltage,
VAUDIO30A via U501(R1114D301D) which is a Audio Codec Analog voltage,
VWLAN18,VWLAN30 via U619(AS1352-7BC0) which is a WLAN voltage,
VTV29,VTV25 via U619(AS1352-7BC0) which is a TV-Out voltage,
VMOTOR33 via U619(AS1352-7BC0) which is a vibrator voltage,
VBT30 via U618(XC6401EE27DR) which is a Buletooth voltage,
SAMSUNG Proprietary-Contents may change without notice
This Document can not be used without Samsung's authorization
2-4
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