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MB89P627 Datasheet(PDF) 8 Page - fujitsu semiconductor |
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MB89P627 Datasheet(HTML) 8 Page - fujitsu semiconductor |
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8 / 61 page  MB89620 Series 8 s PIN DESCRIPTION (Continued) *1: DIP-64P-M01, DIP-64C-A06 *2: MDP-64C-P02 *3: FPT-64P-M06 *4: MQP-64C-P01 *5: FPT-64P-M03 *6: FPT-64P-M09 Pin no. Pin name Circuit type Function SH-DIP*1 MDIP*2 QFP1*3 MQFP*4 SQFP*5 QFP2*6 30 23 22 X0 A Crystal oscillator pins 31 24 23 X1 28 21 20 MOD0 B Operating mode selection pins Connect directly to VCC or VSS . 29 22 21 MOD1 27 20 19 RST C Reset I/O pin This pin is an N-ch open-drain output type with a pull-up resistor, and a hysteresis input type. “L” is output from this pin by an internal reset source. The internal circuit is initialized by the input of “L”. 56 to 49 49 to 42 48 to 41 P00/AD0 to P07/AD7 D General-purpose I/O ports When an external bus is used, these ports function as multiplex pins of lower address output and data I/O. 48 to 41 41 to 34 40 to 33 P10/A08 to P17/A15 D General-purpose I/O ports When an external bus is used, these ports function as upper address output. 40 33 32 P20/BUFC F General-purpose output-only port When an external bus is used, this port can also be used as a buffer control output by setting the BCTR. 39 32 31 P21/HAK F General-purpose output-only port When an external bus is used, this port can also be used as a hold acknowledge output by setting the BCTR. 38 31 30 P22/HRQ D General-purpose output-only port When an external bus is used, this port can also be used as a hold request input by setting the BCTR. 37 30 29 P23/RDY D General-purpose output-only port When an external bus is used, this port functions as a ready input. 36 29 28 P24/CLK F General-purpose output-only port When an external bus is used, this port functions as a clock output. 35 28 27 P25/WR F General-purpose output-only port When an external bus is used, this port functions as a write signal output. 34 27 26 P26/RD F General-purpose output-only port When an external bus is used, this port functions as a read signal output. 33 26 25 P27/ALE F General-purpose output-only port When an external bus is used, this port functions as an address latch signal output. |
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