M30622 Mitsubishi, M30622 Datasheet - Page 29

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

Processor Mode
Figure 1.9.1. Processor mode register 0 and 1
Processor mode register 0 (Note 1)
Processor mode register 1 (Note 1)
b7
b7
b6
b6
0
Note 2: With the processor running in memory expansion mode or in microprocessor mode, setting this
Note 3: The M16C/62T group is not guaranteed to operate in memory expansion and microprocessor modes.
b5
Note 1: Set bit 1 of the protect register (address 000A
b5
Note 1: Set bit 1 of the protect register (address 000A
Note 2: If the V
Note 3: Valid in microprocessor and memory expansion modes.
Note 4: If the entire space is of multiplexed bus in memory expansion mode, choose an 8-bit width.
Note 5: The M16C/62T group is not guaranteed to operate in memory expansion and microprocessor modes.
b4
b4
b3
b3
0
bit provides the means of expanding the external memory area. (Normal mode: up to 1M byte,
expansion mode 1: up to 1.2 M bytes, expansion mode 2: up to 4M bytes)
For details, see “Memory space expansion functions”.
(PM00 and PM01 both are set to “1”.)
The processor 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.
b2
b2
b1
b1
CC
b0
b0
0
voltage is applied to the CNV
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns
out to be
Reserved bit
PM14
PM15
Bit symbol
Bit symbol
Reserved bit
Reserved bit
Reserved bit
PM17
PM01
PM02
PM03
PM04
PM05
PM06
PM07
PM00
Symbol
PM0
Symbol
PM1
indeterminate.
Processor mode bit
Software reset bit
Multiplexed bus space
select bit
Port P4
select bit (Note 3)
BCLK output disable bit
R/W mode select bit
Wait bit
Memory area
expansion bit (Note 2)
0
Address
Bit name
Address
Bit name
0004
0005
to P4
SS
29
16
16
3
, the value of this register when reset is 03
function
16
16
) to “1” when writing new values to this register.
) to “1” when writing new values to this register.
00
When reset
When reset
00000XX0
16
b5 b4
0 : Address output
1 : Port function
b5 b4
0 0 : Normal mode
0 1 : Inhibited
1 0 : Memory area expansion
1 1 : Memory area expansion
The device is reset when this bit is set
to “1”. The value of this bit is “0” when
read.
0 : BCLK is output
1 : BCLK is not output
0 : No wait state
1 : Wait state inserted
0 0 : Multiplexed bus is not used
0 1 : Allocated to CS2 space
1 0 : Allocated to CS1 space
1 1 : Allocated to entire space (Note4)
Must always be set to “0”
Must always be set to “0”
Must always be set to “0”
Must always be set to “0”
b1 b0
0 0: Single-chip mode
0 1: Memory expansion mode
1 0: Inhibited
1 1: Microprocessor mode
0 : RD,BHE,WR
1 : RD,WRH,WRL
(Note 2)
(Address is not output)
(Pin is left floating)
(Do not expand)
mode 1
mode 2
2
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Function
Function
Mitsubishi microcomputers
16
.
M16C / 62T Group
R
R
W
W