M306H2MC-XXXFP Datasheet, PDF (7/210 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with DATA ACQUISITION CONTROLLER

MITSUBISHI MICROCOMPUTERS
M306H2MC-XXXFP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
with DATA ACQUISITION CONTROLLER
Table 1.5.2 Pin Description
Pin name
VCC, VSS
Signal name
Power supply
input
I/O type
CNVSS
CNVSS
Input
Function
Supply 4.75 to 5.25 V to the Vcc pin. Supply 0 V to the Vss pin.
This pin switches between processor modes. Connect this pin to the VSS pin when
after a reset you want to start operation in signal-chip mode (memory expansion
mode) or the VCC pin when starting operation in microprocessor mode.
RESET
XIN
XOUT
BYTE
AVCC
AVSS
VREF
Reset input
Clock input
Clock output
Input
Input
Output
External data Input
bus width
select input
Analog power
supply input
Analog power
supply input
Reference
voltage input
Input
A “L” on this input resets the microcomputer.
These pins are provided for the main clock generating circuit. Connect
a ceramic resonator or crystal between the XIN and the XOUT pins. To
use an externally derived clock, input it to the XIN pin and leave the
XOUT pin open.
This pin selects the width of an external data bus. A 16-bit width is
selected when this input is “L”; an 8-bit width is selected when this input
is “H”. This input must be fixed to either “H” or “L”. Connect this pin to
the VSS pin when not using external data bus.
This pin is a power supply input for the A-D converter. Connect this
pin to VCC.
This pin is a power supply input for the A-D converter. Connect this
pin to VSS.
This pin is a reference voltage input for the A-D converter.
P00 to P07
D0 to D7
P10 to P17
I/O port P0
I/O port P1
Input/output
This is an 8-bit CMOS I/O port. It has an input/output port direction register that
allows the user to set each pin for input or output individually. When used for input
in signal-chip mode, the port can be set to have or not have a pull-up resistor in
units of four bits by software. In memory expansion and microprocessor modes,
selection of the internal pull-resistor in not available
Input/output When set as a separate bus, these pins input and output data (D0–D7).
Input/output This is an 8-bit I/O port equivalent to P0. Pins in this port also function as
external interrupt pins as selected by software.
D8 to D15
Input/output When set as a separate bus, these pins input and output data (D8–D15).
P20 to P27
A0 to A7
A0/D0 to
A7/D7
I/O port P2
A0, A1/D0
to A7/D6
P30 to P37 I/O port P3
Input/output This is an 8-bit I/O port equivalent to P0.
Output
These pins output 8 low-order address bits (A0–A7).
Input/output If the external bus is set as an 8-bit wide multiplexed bus, these pins
input and output data (D0–D7) and output 8 low-order address bits
(A0–A7) separated in time by multiplexing.
Output
If the external bus is set as a 16-bit wide multiplexed bus, these pins
Input/output input and output data (D0–D6) and output address (A1–A7) separated
in time by multiplexing. They also output address (A0).
Input/output This is an 8-bit I/O port equivalent to P0.
A8 to A15
A8/D7,
A9 to A15
P40 to P47
CS0 to CS3,
A16 to A19
I/O port P4
Output
These pins output 8 middle-order address bits (A8–A15).
IOnuptuptu/otutput
If the external bus is set as a 16-bit wide multiplexed bus, these pins
input and output data (D7) and output address (A8) separated in time
by multiplexing. They also output address (A9–A15).
Input/output This is an 8-bit I/O port equivalent to P0.
Output
Output
These pins output CS0–CS3 signals and A16–A19. CS0–CS3 are chip
select signals used to specify an access space. A16–A19 are 4 high-
order address bits.
Rev. 1.0
6