Casio A-10 - Page 31

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No Pin Name In/Out Function To/From
84 MD2/RXD I Data inout of serial port 0 GA
85 MD1/TXD O Data output of serial port 0 GA
86 MD0/SCK I/O Clock of serial port 0. Connected to GND
87 BREQB I Bus request SYSTEM LSI, GA
88 RESETB I Reset signal from SYSTEM LSI SYSTEM LSI, GA
89 NMI I Non-maskable Interrupt request SYSTEM LSI
90 IRL3 I Interrupt request SYSTEM LSI
91 IRL2 I Interrupt request. Connected to +3.3 V
92 IRL1 I Interrupt request. Connected to +3.3 V
93 IRL0 I Interrupt request. Connected to +3.3 V
94 IOIS16B I Write protect input GA
95 IRQOUTB O Not used
96 BASKB O Bus access permission SYSTEM LSI
97 STATUS1 O Not used
98 STATUS0 O Bus status SYSTEM LSI
99 ONSTAUTSB O V3ROM (+3.3 V) ON/OFF control. H=ON SYSTEM LSI,Power
101 CKIO I/O System clock I/O SYSTEM LSI, GA
103 MD4/CE2B O Chip enable GA
104 ONB I On circuit start request SYSTEM LSI
105 BSB O Not used
106 RD/WRB O Read / Write signal SYSTEM LSI, GA
107 RDB O Read pulse SYSTEM LSI, GA
108 CS6B/CE1B O Chip select-6 signal GA
109 CS5B O Not used
110 CS4B O Chip select -4 signal SYSTEM LSI, GA
111 CS3B O Not used
112 CS2B O Not used
113 CS1B O Not used
114 CS0B O Chip select -0 signal SYSTEM LSI, M-slot
117 ICIOWRB O Write signal for PCMCIA I/O GA
118 ICIORDB O Read signal for PCMCIA I/O GA
119 CAS2HB O D15~D8 select signals for RAM on Memory slot
120 CAS2LB O D7~D0 select signals M-slot
123 WE1B I D15~D8 select signals SYSTEM LSI, GA
124 WE0B I D7~D0 select signals SYSTEM LSI, GA
125 CASLHB I D15~D8 select signals SYSTEM LSI
126 CASSLL/OEB I D7~D0 select / memory select signal SYSTEM LSI
129 RAS/CEB O CE signal for RAM SYSTEM LSI
130 MD5/RAS2B I/O RAS for DRAM on Memory slot M-slot
131 STATUS3 O Not used
132 SYAYUS2 O Not used
134 WAITB I Hardware wait request GA
136 XTAL2 O Oscillator terminal(for internal RTC) Y1
137 EXTAL2 I Oscillator terminal(for internal RTC) Y1
140 RTCCLK O RTC clock output SYSTEM LSI
141 RTCCLKENB I RTC clock output enable. Connected to GND
142 RXD1 I Serial port1(232C) data input SYSTEM LSI, U6
143 TXD1 O Serial port1(232C) data output SYSTEM LSI, U6