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M37478M4-408SP Datasheet(PDF) 7 Page - Mitsubishi Electric Semiconductor |
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M37478M4-408SP Datasheet(HTML) 7 Page - Mitsubishi Electric Semiconductor |
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7 / 47 page  7 MITSUBISHI MICROCOMPUTERS 7477/ 7478 GROUP SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER Input/ Output PIN DESCRIPTION Pin Name Functions Power source Analog power source Reset input Clock input Clock output Reference voltage input I/O port P0 I/O port P1 Input port P2 Input port P3 I/O port P4 Input port P5 Input Input Output Input I/O I/O Input Input I/O Input Notes 1 : AVSS for M37478M4/M8/E8-XXXFP. 2 : Only P20–P23 (IN0–IN3) 4-bit for the 7477 group. 3 : Only P40 and P41 2-bit for the 7477 group. 4 : This port is not included in the 7477 group. Apply voltage of 2.7 to 5.5V to VCC, and 0V to VSS. Ground level input pin for A-D converter. Same voltage as VSS is applied. To enter the reset state, the reset input pin must be kept at “L” for 2 µs or more (under normal VCC conditions). These are I/O pins of internal clock generating circuit for main clock. To control generating frequency, an external ceramic or a quartz crystal oscillator is connected between the XIN and XOUT pins. If an external clock is used, the clock source should be connected the XIN pin and the XOUT pin should be left open. Feedback resistor is connected between XIN and XOUT. Reference voltage input pin for A-D converter. Port P0 is an 8-bit I/O port. The output structure is CMOS output. When this port is selected for input, pull-up transistor can be connected in units of 1-bit and a key on wake up function is provided. Port P1 is an 8-bit I/O port. The output structure is CMOS output. When this port is selected for input, pull-up transistor can be connected in units of 4-bit. P12 and P13 are in common with timer output pins T0 and T1. P14, P15, P16 and P17 are in common with serial I/O pins RXD, TXD, SCLK ____ and SRDY, respectively. Port P2 is an 8-bit input port. This port is in common with analog input pins IN0 to IN7. Port P3 is a 4-bit input port. P30, P31 are in common with external interrupt input pins INT0, INT1, and P32, P33 are in common with timer input pins CNTR0, CNTR1. Port P4 is a 4-bit I/O port. The output structure is CMOS output, When this port is selected for input, pull-up transistor can be connected in units of 4-bit. Port P5 is a 4-bit input port and pull-up transistor can be connected in units of 4-bit. P50, P51 are in common with input/output pins of clock for clock function XCIN, XCOUT. When P50, P51 are used as XCIN, XCOUT, connect a ceramic or a quartz crystal oscillator between XCIN and XCOUT. If an external clock input is used, connect the clock input to the XCIN pin and open the XCOUT pin. Feedback resistor is connected between XCIN and XCOUT pins. VCC, VSS AVSS (Note 1) RESET XIN XOUT VREF P00 – P07 P10 – P17 P20 – P27 (Note 2) P30 – P33 P40 – P43 (Note 3) P50 – P53 (Note 4) |
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