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MB90800 Datasheet(PDF) 25 Page - Fujitsu Component Limited. |
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MB90800 Datasheet(HTML) 25 Page - Fujitsu Component Limited. |
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25 / 92 page  MB90800 Series DS07-13733-6E 25 ■ PERIPHERAL RESOURCES 1. I/O port The I/O ports function to output data from the CPU to I/O pins by setting their port data register (PDR) and send signals input to I/O pins to the CPU. In addition, the port can randomly set the direction of the input/output of the port in bit by the port direction register (DDR). The MB90800 series has 68 (70 ports when the subclock is not used) input/output pins. Port0 to port8 (port0 to port9 when product without the subclock is used) are input/output port. (1) Port data register * : R/W access to I/O ports is a bit different in behavior from R/W access to memory as follows • Input mode When reading : Read the corresponding pin level. When writing : Write into the latch for the output. • Output mode When reading : Read the value of the data register latch. When writing : Write into the corresponding pin. - : Unused PDR0 bit Initial Value Access Address : 000000H Indeterminate R/W* PDR1 bit Address : 000001H Indeterminate R/W* PDR2 bit Address : 000002H Indeterminate R/W* PDR3 bit Address : 000003H Indeterminate R/W* PDR4 bit Address : 000004H Indeterminate R/W* PDR5 bit Address : 000005H Indeterminate R/W* PDR6 bit Address : 000006H Indeterminate R/W* PDR7 bit Address : 000007H Indeterminate R/W* PDR8 bit Address : 000008H Indeterminate R/W* PDR9 bit Address : 000009H Indeterminate R/W* 76 5 4 3 2 1 0 P06 P07 P05 P04 P03 P02 P01 P00 15 14 13 12 11 10 9 8 P16 P17 P15 P14 P13 P12 P11 P10 76 5 4 3 2 1 0 P26 P27 P25 P24 P23 P22 P21 P20 15 14 13 12 11 10 9 8 P36 P37 P35 P34 P33 P32 P31 P30 76 5 4 3 2 1 0 P46 P47 P45 P44 P43 P42 P41 P40 15 14 13 12 11 10 9 8 P56 P57 P55 P54 P53 P52 P51 P50 76 5 4 3 2 1 0 P66 P65 P64 P63 P62 P61 P60 P67 15 14 13 12 11 10 9 8 P76 P75 P74 P73 P72 P71 P70 ⎯ 76 5 4 3 2 1 0 P84 P83 P82 P81 P80 ⎯ ⎯ ⎯ 15 14 13 12 11 10 9 8 P91 P90 ⎯ ⎯ ⎯ ⎯ ⎯ ⎯ |
Similar Part No. - MB90800_09 |
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Similar Description - MB90800_09 |
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