Sharp XE-A203 Service Manual - Page 8
Hardware Description - driver
UPC - 074000049178
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CHAPTER 4. HARDWARE DESCRIPTION 1. HARDWARE BLOCK DIAGRAM POWER DRY Battery 5.8V 5.0V BUZZER 3.3V 7.9V 23.8V 12MHz CPU Renesus RESET IC 32.768kHz DRAWER M30624MWPD85FP ROM 320KByte RAM 24KByte LV125 HCT04 SD CARD Driver/Sensor PRINTER MT53II MOTOR S-RAM 128KByte USB Controller M66291GP USB Type B 74H374 SEG Driver Decoder 74HC138 x 2 4 to 16 DIG Driver KEY SCAN KEY RETURN LED Front 10 PopUp 7 KEY SWITCH CPU: External RAM: Printer: USB controller: M30624MWP-D85FP (Renesus) ROM 320KByte (MASK) RAM 24KByte 1Mbit (128K x 8) CYPRESS CY62128BLL-70SXI MT53II (EPSON) M66291GP (Renesus) 2. MEMORY MAP 1MByte mode/The CS area PM13 = 1 is selected. CPU internal RAM: External RAM: 24KByte 00400h-063FFh 128KByte 08000h-27000h (Area that can be used 124KByte) 00000h 00400h 063FFh 06400h CPU internal RAM 24KByte 00400h-063FFh 08000h External RAM 128KByte /CS2 27000h 28000h USB controller 30000h Segment Latch Address /CS1 /CS0 80000h B0000h CPU internal MASK ROM 320KByte B0000h-FFFFFh FFFFFh XE-A203U/XE-A203A HARDWARE DESCRIPTION - 6 -