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M37733MHL Datasheet(PDF) 4 Page - Mitsubishi Electric Semiconductor |
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M37733MHL Datasheet(HTML) 4 Page - Mitsubishi Electric Semiconductor |
4 / 27 page PRELIMINARY Notice: This is not a final specification. Some parametric limits are subject to change. 4 MITSUBISHI MICROCOMPUTERS M37733MHLXXXHP SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER PIN DESCRIPTION XIN Clock input Input XOUT Clock output Output 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. When output level of E signal is “L”, data/instruction read or data write is performed. 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. 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). 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 (A16 – A23) is output. 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. 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 φ 1 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 and input pins for key input interrupt input (KI0 – KI3). 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 φ SUB 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. P72 to P75 also function as I/O pins for UART2. 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. |
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