Service Manual Chapter4. Control Electronics
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Nautilus Hyosung, Inc.
All Rights Reserved.
4-5
Mother Board Specifications
Detailed functionality
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Detailed functionality
1. CPU
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Processor : Intel PXA270 520MHz
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Clock Input : 13MHz (PLL make : Max 520MHz)
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RTC : Used RTC included CPU
2. Reset circuit : Used the dedicated IC (integrated chip)
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Used the reset signal included PMIC
3. Memory
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64MB NAND FLASH : Intel STRATA Flash JS28F256P30B85 (32MB) * 2EA
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Asynchronous page read mode : 25ns
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64MB SDRAM : K4S561632F (32MB) * 2EA
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MAX Frequency : 133MHz
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Supporting 128MB using the K4S561632F * 4EA (Option)
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512KB NV-RAM : K6X4016T3F(BATTERY BACK UP)
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Access Time : 70nS
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Retention Current : 10uA(MAX)
4. Serial Port Interface
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Interface : asynchronous communication with RS-232C
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Interface DRV. IC used : Compatible with Max3232
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Supporting 7 port in total (CPU 3PORT as well as TL16C554 4PORT)
5. PMIC
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MAX1586B : Six Regulators, Battery switching, Reset, Push button Reset
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Vcc Core : 1.8V (MAX 0.9A)
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Vcc I/O : 3.3V (MAX 1.3A)
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Vcc MEM : 3.3V (MAX 0.5A)
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Vcc PLL : 1.3V, Vcc USIM : 1.8V, Vcc SRAM : 1.1V (Typ 90mA)
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Vcc BAT : Battery supply switching
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Shutdown Current : 5uA
