Casio PA-2500 Especificações descarregar pdf (Página 29)

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No. Pin Name Io/Out Function To/From

119 CASHHB / CAS2HB O D31-D24 / D15-D8 select signal BGA288,ROM Board

120 CASHLB / CAS2LB O D23-D16 / D7-D0 select signal BGA288,ROM Board

121 Vss GND

122 Vcc +3.3V source

123 WE1B O D15-D8 select signal BGA288

124 WE0B O D7-D0 select signal BGA288,LCD uint,ROM Board

125 CASLHB O D15-D8 select signal BGA288,ROM Board

126 CASLLB / OEB O D7-D0 select / memory select signal BGA288,ROM Board

127 Vss GND

128 Vcc +3.3V source

129 RASB / CEB O CE signal for RAM,ROM BGA288,RAM,ROM Board

130 MD5 / RAS2B Not used

131 HSTBYB I Not used +3.3V source

132 WAITB I Hardware wait request BGA288

133 Vss GND

134 RTCCLK O RTC clock output BGA288

135 Vcc(RTC) +3.3V source(for internal RTC)

136 XTAL2 O Oscillator terminal(for internal RTC) C6

137 EXTAL2 I Oscillator terminal(for internal RTC) C6

138 Vss(RTC) GND(for internal RTC)

139 Vcc +3.3V source

140 D31 I/O Data bus

141 D30 I/O Data bus

142 D29 I/O Data bus

143 D28 I/O Data bus

144 Vss GND

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Casio PA-2500 Especificações Página 29