M37733M4LXXXHP Datasheet, PDF (4/31 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

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MITSUBISHI MICROCOMPUTERS
M37733M4LXXXHP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
PIN DESCRIPTION
Pin
Vcc,
Vss
CNVss
_________________
RESET
XIN
XOUT
_
E
BYTE
AVcc,
AVss
VREF
P00 – P07
P10 – P17
P20 – P27
P30 – P33
P40 – P47
P50 – P57
P60 – P67
P70 – P77
P80 – P87
Name Input/Output
Power source
CNVss input
Input
Reset input
Clock input
Clock output
Enable output
Input
Input
Output
Output
External data
bus width
selection input
Analog power
source input
Reference
voltage input
I/O port P0
Input
Input
I/O
I/O port P1
I/O
I/O port P2
I/O
I/O port P3
I/O
I/O port P4
I/O
I/O port P5
I/O
I/O port P6
I/O
I/O port P7
I/O
I/O port P8
I/O
Functions
Apply 2.7 – 5.5 V to Vcc and 0 V to Vss.
This pin controls the processor mode. Connit to Vss for the single-chip mode and the memory
expansion mode, and to Vcc for the microprocessor mode.
When “L” level is applied to this pin, the microcomputer enters the reset state.
These are pins of main-clock genirating circuit. Connict 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.
This pin functions as the e_{_} nable 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.
In the memory expansion mode or the microprocessor mode, this pin determinis whether the
external data bus has an 8-bit width or a 16-bit width. The data bus has a 16-bit width when “L”
signal is input and an 8-bit width when “H” signal is input.
Power source input pin for the A-D converter. Externally connict AVcc to Vcc and AVss to Vss.
This is reference voltage input pin for the A-D converter.
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).
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.
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.
In the single-chip mode, these pins ha_{___}v_{__}e _{_}t_{__} h_{__}e_{__}same functi_{_}o_{__} n_{__}a_{_}s port P0. In the memory expansion
mode or the microprocessor mode, R/W, BHE, ALE, and HLDA signals are output.
In the single-chip mode, these pins have the same functions as_{__} p_{__}o_{__}r_{_}t_{_}P0. In_{___}t_{_}h_{___}e memory expansion
mode or the microprocessor mode, P40, P41, and P42 become HOLD and RDY input pins, and
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 also functions as an I/O port.
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).
In addition to having the same functions as port P0 in the single-chip m_{__}o_{___}d_{___}e, th_{___}e_{___}s_{__}e 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.
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.
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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