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Circuit Description
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2-2-8. Memory
Signals in the OM6359 enable memory. They use volt supply voltage, VDD3 in the PCF50601. This system uses
Spansion's memory,
S71WS128NC0BFWA70
. It is consisted of 128M bits flash NOR memory and 64M bits SRAM. It has 16
bit data line, HD[0~15] which is connected to OM6359. It has 23 bit address lines, HA[1~23]. NCSFLASH & NCSRAM
signals are chip select.
Writing process, HWR_N is low and it enables writing process to flash memory and SRAM.
During reading process, HRD_N is low and it enables reading process to flash memory and SRAM. Reading or writing
procedure is processed after HWR_N or HRD_N is enabled.
2-2-9. OM6359
OM6359 is consisted of ARM core and DSP core. It has
8x1Kword on-chip program/data RAM, 55 Kwords
on-chip program ROM
in the DSP. It has 4K*32bits ROM and 2K*32bits RAM in the ARM core. DSP is consisted
of KBS, JTAG, EMI and UART. 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.
KBIO(0:7), address lines of DSP core and HD[0~15]. HA[1~26], address lines of ARM core and HD[0~15], data lines of
ARM core are connected to memory and YMU762.
NCSRAM, NCSFLASH in the ARM core are connected to each memory. HWR_N and HRD_N control the process of
memory. External IRQ(Interrupt ReQuest) signals from each units, such as, PMU need the compatible process.
KBIO[0~7] receive the status from key and RXD0/TXD0 are used for the communication using
data link
cable(DEBUG_DTR/RTS/TXD/RXD/CTS/DSR).
It has JTAG control pins(TDI/TDO/TCK) for ARM core and DSP core. It receives 13MHz clock in CKI pin from
external TCXO. ADC(Analog to Digital Convertor) part receives the status of temperature, battery type and battery voltage.
2-2-10. TOH2600DGI4KRA(26MHz)
This system uses the 26MHz TCXO, TOH2600DGI4KRA, SEM. AFC control signal from OM6359 controls frequency
from 26MHz x-tal. The clock output frequency of UAA3536 is 13MHz. This clock is connected to OM6359, YMU762.
2-2-11. FM Radio(SI4700)
The SI4700 is a single chip electronically tuned FM radio for low voltage application with fully
integrated IF selectivity and demodulation.
The radio is completely adjustment free and does only require a minimum of small and low cost external
components. The radio can tune the European-, US- and Japan FM bands.