Samsung SGH-V200 Service Manual page 8

6. Trident
Trident is consisted of ARM core and DSP core. It has 20K*16bits RAM 144K*16bits ROM in the DSP. It has
4K*32bits ROM and 2K*32bits RAM in the ARM core. DSP is consisted of timer, one bit input/output unit(BIO), JTAG,
EMI and HDS(Hardware Development System). ARM core is consisted of EMI, PIC(Programmable Interrupt Controller),
reset/power/clock unit, DMA controller, TIC(Test Interface Controller), peripheral bridge, PPI, SSI(Synchronous Serial
Interface), ACC(Asynchronous communications controllers), timer, ADC, RTC(Real-Time Clock) and keyboard interface.
DSP_AB[0~8], address lines of DSP core and DSP_DB[0~15], data lines of DSP core are connected to CSP1093.
A[0~20], address lines of ARM core and D[0~15], data lines of ARM core are connected to memory, LCD and YMU759.
ICP(Interprocessor Communication Port) controls the communication between ARM core and DSP core.
CSROMEN, CSRAMEN and CS1N to CS4N in the ARM core are connected to each memory. WEN and OEN control
the process of memory. External IRQ(Interrupt ReQuest) signals from each units, such as, YMU, Ear-jack, Ear-mic and
CSP1093, need the compatible process.
Some PPI pins has many special functions. CP_KB[0~9] receive the status from key FPCB and are used for the
communicatios using IRDA(IRDA_RX/TX/EN) and data link cable(DEBUG_DTR/RTS/TXD/RXD/CTS/DSR). And
UP_CS/SCLK/SDI, control signals for PSC2006 are outputted through PPI pins. It has signal port for charging(CHG_DET,
CHG_STAT0), SIM_RESET and FLIP_SNS with which we knows open.closed status of folder. It has JTAG control
pins(TDI/TDO/TCK) for ARM core and DSP core. It recieves 13MHz clock in CKI pin from external TCXO and receives
32.768KHz clock from X1RTC. ADC(Analog to Digital Convertor) part receives the status of temperature, battery type
and battery voltage. And control signals(DSP_INT, DSP_IO and DSP_RWN) for DSP core are used. It enables main LCD
and small LCD with DSP IP pins.
7. CSP1093
CSP1093 integrates the timing and control functions for GSM 2+ mobile application with the ADC and DAC functions.
The CSP1093 interfaces to the trident, via a 16-bit parallel interface. It serves as the interface that connects a DSP to the
RF circuitry in a GSM 2+ mobile telephone. DSP can load 148 bits of burst data into CSP1093 ¡¯ s internal register, and
program CSP1093 ¡¯ s event timing and control register with the exact time to send the burst. When the timing portion of
the event timing and control register matches the internal quarter-bit counter and internal frame counter, the 148 bits in
the internal register are GMSK modulated according to GSM 2+ standards. The resulting phase information is translated
into I and Q differential output voltages that can be connected directly to an RF modulator at the TXOP and TXON pins.
The DSP is notified when the transmission is completed. For receiving baseband data, a DSP can program CSP1093 ¡¯ s
event timing and control register with the exact time to start receiving I and Q samples through TXIP and TXIN pins.
When that time is reached, the control portion of the event timing and control register will start the baseband receive
section converting I and Q sample pairs. The samples are stored in a double-buffered register until the register contains
32 sample pairs. CSP1093 then notifies the DSP which has ample time to read the information out before the next 32
sample pairs are stored. The voice band ADC converter issues an interrupt to the DSP whenever it finishes converting a
16-bit PCM word. The DSP then reads the new input sample and simultaneously loads the voice band output DAC
converter with a new PCM output word. The voice band output can be connected directly to a speaker via AOUTAN and
AOUTAP pins and be connected to a Ear-mic speaker via AOUTBN and AOUTBP pins.
8. X-TAL(13MHz)
This system uses the 13MHz TCXO, TCO-9141B, Toyocom. AFC control signal form CSP1093 controls frequency from
13MHz x-tal. It generates the clock frequency. This clock is inverted through NOT gate, TC7S04FU and is connected to
CSP1093. 13MHz clock for YMU759 uses a not-inverted clock. Clock for RF parts uses same type.
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SG H- V200 Circuit Description