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MB91154PFV-G Datasheet(PDF) 6 Page - Fujitsu Component Limited. |
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MB91154PFV-G Datasheet(HTML) 6 Page - Fujitsu Component Limited. |
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6 / 105 page  MB91F155A/MB91155/MB91154 6 (Continued) Pin No. Pin name Circuit type Function 46 BGRNT/P81 F External bus release acceptance output This function is enabled when external bus release acceptance output is allowed. Output “L” upon releasing of the external bus. This pin is available as a port when external bus release acceptance out- put is not allowed. 47 BRQ/P82 C External bus release request input This function is enabled when external bus release request input is al- lowed. Input “1” when the release of the external bus is desired. This pin is available as a port when external bus release request input is not in use. 48 RD/P83 F External bus read strobe output This function is enabled when external bus read strobe output is allowed. This pin is available as a port when external bus read strobe output is not allowed. 49 WR0/P84 F External bus write strobe output This function is enabled in external bus mode. This pin is available as a port in single chip mode. 50 WR1/P85 F External bus write strobe output This function is enabled in external bus mode when the bus width is 16 bits. This pin is available as a port in single chip mode or when the external bus width is 8 bits. 51 CLK/P86 F System clock output The pin outputs the same clock as the external bus operating frequency. The pin is available as a port when it is not used to output the clock. 52 53 54 MD2 MD1 MD0 G Mode pins To use these pins, connect them directly to either VCC or VSS. Use these pins to set the basic MCU operating mode. 55 RST B External reset input 57 58 X1 X0 A High-speed clock oscillation pins (16.5 MHz) 60 61 62 63 INT0/PC0 INT1/PC1 INT2/PC2 INT3/PC3 H External interrupt request input 0-3 Since this input is used more or less continuously when the corresponding external interrupt is allowed, output by the port needs to be stopped ex- cept when it is performed deliberately. Since this port is allowed to input also in standby mode, it can be used to reset the standby state. These pins are available as ports when external interrupt request input is not in use. |
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