TCM4300IPZ datasheet(65/69 Pages) TI1

65 / 69 page

4–30

4.24.2

Mitsubishi Microcontroller Mode of Operation

When the microcontroller type select MTS1 and MTS0 inputs are held high and low, respectively, the

TCM4300 microcontroller interface is configured in Mitsubishi mode. In this mode, the interface has a single

read/write control (R / W) signal, an active-low data strobe (MCDS) signal, and active-low interrupt request

signals. The processor E and R/(W) signals should be connected to the TCM4300 MCDS signal and the

MCRW signal, respectively. Table 4–26 lists the microcontroller interface connections for Mitsubishi mode.

Table 4–26. Microcontroller Interface Connections for Mitsubishi Mode

TCM4300

TERMINAL

MICROCONTROLLER TERMINAL

MTS1, MTS0

Tie to logic levels: high and low, respectively

MCCSH

Not on microcontroller; can be used for address decoding

MCCSL

Not on microcontroller; can be used for address decoding

MCD7–MCD0

D[7:0] data bus on microcontroller

MCA4–MCA0

A[4:0]

MCRW

R/W

MCDS

E (Active-low read data strobe) MCDS configured to active-low operation by MTS1 and MTS0.

MWBDFINT

Either one of INT3 through INT0 as appropriate

DINT

Either one of INT3 through INT0 as appropriate

4.24.3

Motorola Microcontroller Mode of Operation

When the microcontroller selects MTS0 = high and MTS1 = low, the TCM4300 microcontroller interface is

configured for 8-bit family (6800 family derivatives, e.g., 68HC11D3 and 68HC11G5) bus characteristics,

and when the microcontroller selects MTS0 = low and MTS1 = high, the microcontroller interface is

configured for 16-bit family (680

× 0 family derivatives, e.g., 68008 and 68302) characteristics. The Motorola

mode makes use of a single read/write control (R/ W) signal and active-low interrupt request signals. The

processor E (8-bit) or DS (16-bit) and (R/ W) control signals should be connected to the TCM4300 MCDS

signal and the MCRW signal, respectively. Table 4–27 illustrates the connections between the TCM4300

and an 8-bit Motorola processor. Table 4–28 illustrates the connections between the TCM4300 and a 16-bit

Motorola processor.

Table 4–27. Microcontroller Interface Connections for Motorola Mode (8 bits)

TCM4300

TERMINAL

MICROCONTROLLER TERMINAL

MTS1, MTS0

Tie to logic levels: low and high, respectively

MCCSH

Not on microcontroller; can be used for address decoding

MCCSL

Not on microcontroller; can be used for address decoding

MCD7–MCD0

PC[7:0] data bus on microcontroller

MCA4–MCA0

Demultiplexed address output. PF[4:0] on microcontroller for nonmultiplexed machines (e.g.,

68CH11G5) and not on micro for multiplexed bus machines (e.g., 68HC11D3).

MCRW

R/W

MCDS

E (Active-high data strobe) MCDS configured to active-high operation by MTS1 and MTS0.

MWBDFINT

IRQ and/or NMI as appropriate

DINT

IRQ and/or NMI as appropriate

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