M30622 Mitsubishi, M30622 Datasheet - Page 32

• Manufacturer Part Number: M30622
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
• Manufacturer: Mitsubishi

Bus Settings
Table 1.11.2. Pin functions for each processor mode
Note 1: In M30623(80-pin package), set the data bus width to 8 bits by any of the following operations, to transfer the
Note 2: If the entire space is of multiplexed bus in memory expansion mode, choose an 8-bit width. The processor
Note 3: Address bus when in separate bus mode.
Note 4: In M30623(80-pin package), P1, P4
Note 5: M16C/62T group is not guaranteed to operate in memory expansion and microprocessor modes.
function select bit = 1
function select bit = 0
Processor mode
Multiplexed bus
space select bit
Data bus width
BYTE pin level
Port P4
Port P4
P0
P1
P2
P2
P3
P3
P4
P4
P4
P5
P5
P5
P5
P5
0
0
0
1
0
1
0
0
4
0
4
5
6
7
to P0
to P1
to P2
to P3
to P4
to P4
to P4
to P5
microcomputer to memory expansion mode correctly.
operates using the separate bus after reset is revoked, so the entire space multiplexed bus cannot be chosen
in microprocessor mode.
The higher-order address becomes a port if the entire space multiplexed bus is chosen, so only 256 bytes can
be used in each chip select.
0
0
to P4
to P4
• At reset, input “H” to the CNV
• At reset, input “L” to the CNV
processor mode bit to memory expansion mode.
Then, set the processor mode bit to memory expansion mode.
7
7
7
7
3
3
7
3
3
3
Single-chip
I/O port
I/O port
I/O port
I/O port
I/O port
I/O port
I/O port
I/O port
I/O port
I/O port
I/O port
I/O port
I/O port
I/O port
mode
Address bus/
data bus (Note 3)
Address bus/
data bus (Note 3)
Either CS1 or CS2 is for multiplexed bus
and others are for separate bus
CS (chip select) or programmable I/O port
(For details, refer to “Bus control”.)
Outputs RD, WRL, WRH, and BCLK or RD, BHE, WR, and BCLK
(For details, refer to “Bus control”.)
Address bus
Address bus
Address bus
8 bits “H”
Data bus
I/O port
I/O port
SS
HOLD
HLDA
RDY
ALE
SS
(BYTE) pin to start the program in single-chip mode, and input “H” to this pin.
4
(BYTE) pin to start the program in microprocessor mode. Then, set the
to P4
“01”, “10”
Memory expansion / microprocessor modes
7
Address bus/
data bus (Note 3)
Address bus/
data bus (Note 3)
have no corresponding external pin.
Address bus
Address bus
Address bus
16 bits “L”
Data bus
Data bus
I/O port
HLDA
HOLD
32
RDY
ALE
Address bus
Address bus
Address bus
Address bus
Address bus
Data bus
8 bits “H”
I/O port
I/O port
HOLD
HLDA
RDY
ALE
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(separate bus)
“00”
Address bus
Address bus
Address bus
Address bus
Address bus
16 bits “L”
Data bus
Data bus
I/O port
HOLD
HLDA
ALE
RDY
Mitsubishi microcomputers
M16C / 62T Group
multiplexed bus
for the entire space
expansion mode
“11” (Note 2)
Address bus
/data bus
Address bus
/data bus
8 bits “H”
Memory
(Note 1)
I/O port
I/O port
I/O port
I/O port
I/O port
HOLD
A
HLDA
RDY
ALE
8
/D
7