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5 page 
MB91345 Series 5 ■ PIN DESCRIPTION (Continued) Pin No. Pin name I/O Circuit type* Function 1 VSS ⎯ GND pin 2C ⎯ Power stabilization capacitance pin 3 P24 B General-purpose I/O port A04 Bit 4 of external address bus output pin. Enabled when external bus is effective. SOT1 Multi function serial 1 serial data output pin 4 P25 B General-purpose I/O port. Enabled in single-chip mode. A05 Bit 5 of external address bus output pin. Enabled when external bus is effective. SCK1 Multi function serial 1 clock I/O pin 5 P26 B General-purpose I/O port. Enabled in single-chip mode. A06 Bit 6 of external address bus output pin. Enabled when external bus is effective. SIN2 Multi function serial 2 serial data input pin 6 P27 B General-purpose I/O port. Enabled in single-chip mode. A07 Bit 7 of external address bus output pin. Enabled when external bus is effective. SOT2 Multi function serial 2 serial data output pin 7 P30 B General-purpose I/O port. Enabled in single-chip mode. A08 Bit 8 of external address bus output pin. Enabled when external bus is effective. SCK2 Multi function serial 2 clock I/O pin 8 P31 B General-purpose I/O port. Enabled in single-chip mode. A09 Bit 9 of external address bus output pin. Enabled when external bus is effective. AIN0 Up down counter input pin TOT0-2 Reload timer output pin 9 P32 B General-purpose I/O port. Enabled in single-chip mode. A10 Bit 10 of external address bus output pin. Enabled when external bus is effective. BIN0 Up down counter input pin TOT1-2 Reload timer output pin |
