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M37736M4L Datasheet(PDF) 4 Page - Mitsubishi Electric Semiconductor |
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M37736M4L Datasheet(HTML) 4 Page - Mitsubishi Electric Semiconductor |
4 / 32 page 4 MITSUBISHI MICROCOMPUTERS M37736M4LXXXHP SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER PRELIMINARY Notice: This is not a final specification. Some parametric limits are subject to change. Pin Name Input/Output Functions Vcc, Power source Apply 2.7 – 5.5 V to Vcc and 0 V to Vss. Vss CNVss CNVss input Input This pin controls the processor mode. Connect to Vss for the single-chip mode and the memory expansion mode, and to Vcc for the microprocessor mode. _____ RESET Reset input Input When “L” level is applied to this pin, the microcomputer enters the reset state. These are pins of main-clock generating circuit. Connect a ceramic resonator or a quartz- crystal oscillator between XIN and XOUT. When an external clock is used, the clock source should be connected to the XIN pin, and the XOUT pin should be left open. _ E Enable output Output This pin functions as the enable signal output pin which indicates the access status in the internal bus. In the external bus mode B and the memory expansion mode or the microprocessor mode, ___ this pin output signal RDE. BYTE External data Input In the memory expansion mode or the microprocessor mode, this pin determines whether the bus width external data bus has an 8-bit width or a 16-bit width. The data bus has a 16-bit width when “L” selection input signal is input and an 8-bit width when “H” signal is input. BSEL Bus method Input In the memory expansion mode or the microprocessor mode, this pin determines the external bus select input mode. The bus mode becomes the external bus mode A when “H” signal is input, and the external bus mode B when “L” signal is input. AVcc, Analog power Power source input pin for the A-D converter. Externally connect AVcc to Vcc and AVss to Vss. AVss source input VREF Reference Input This is reference voltage input pin for the A-D converter. voltage input P00 – P07 I/O port P0 I/O In the single-chip mode, port P0 becomes an 8-bit I/O port. An I/O direction register is available so that each pin can be programmed for input or output. These ports are in the input mode when reset. In the memory expansion mode or the microprocessor mode, these pins output address (A0 – A7) ___ ___ ____ at the external bus mode A, and these pins output signals CS0 – CS4 and RSMP, and addresses (A16, A17) at the external bus mode B. P10 – P17 I/O port P1 I/O In the single-chip mode, these pins have the same functions as port P0. When the BYTE pin is set to “L” in the memory expansion mode or the microprocessor mode and external data bus has a 16-bit width, high-order data (D8 – D15) is input/output or an address (A8 – A15) is output. When the BYTE pin is “H” and an external data bus has an 8-bit width, only address (A8 – A15) is output. P20 – P27 I/O port P2 I/O In the single-chip mode, these pins have the same functions as port P0. In the memory expansion mode or the microprocessor mode, low-order data (D0 – D7) is input/output or an address is output. When using the external bus mode A, the address is A16 – A23. When using the external bus mode B, the address is A0 – A7. P30 – P33 I/O port P3 I/O In the single-chip mode, these pins have the same function as port P0. In the memory expansion _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ mode or the microprocessor mode, R/W, BHE, ALE, and HLDA signals are output at the external ________ ____________ _________________ bus mode A, and WEL, WEH, ALE, and HLDA signals are output at the external bus mode B. P40 – P47 I/O port P4 I/O In the single-chip mode, these pins have the same functions as port P0. In the memory expansion ____ ___ mode or the microprocessor mode, P40, P41, and P42 become HOLD and RDY input pins, and a clock φ1 output pin, respectively. Functions of the other pins are the same as in the single-chip mode. However, in the memory expansion mode, P42 can be selected as an I/O port. P50 – P57 I/O port P5 I/O In addition to having the same functions as port P0 in the single-chip mode, these pins also function as I/O pins for timers A0 to A3. P60 – P67 I/O port P6 I/O In addition to having the same functions as port P0 in the single-chip mode, these pins also ___ ___ function as I/O pins for timer A4, input pins for external interrupt input (INT0 – INT2) and input pins for timers B0 to B2. P67 also functions as sub-clock φSUB output pin. P70 – P77 I/O port P7 I/O In addition to having the same functions as port P0 in the single-chip mode, these pins function as input pins for A-D converter. Additionally, P76 and P77 have the function as the output pin (XCOUT) and the input pin (XCIN) of the sub-clock (32 kHz) oscillation circuit, respectively. When P76 and P77 are used as the XCOUT and XCIN pins, connect a resonator or an oscillator between the both. P80 – P87 I/O port P8 I/O In addition to having the same functions as port P0 in the single-chip mode, these pins also function as I/O pins for UART 0 and UART 1. P90 – P97 Output port P9 Output Port P9 is an 8-bit I/O port. These ports are floating when reset. When writing to the port latch, these ports become the output mode. P90 – P93 also function as I/O port for UART 2. P100 – P107 I/O port P10 I/O In addition to having the same functions as port P0 in the single-chip mode. P104 – P107 also __ __ function as input pins for key input interrupt input (Kl0 – Kl3). EVL0, EVL1 Output These pins should be left open. PIN DESCRIPTION XIN Clock input Input XOUT Clock output Output |
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