M306H2MC-XXXFP Datasheet, PDF (153/210 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
For accessing to expantion register data, set accessing address (DA5 to DA0) (shown in Table 2.15.3)
to expantion register address control register (address 021616). Then write data (DD15 to DD0) by
expantion register data control register (address 021816). When end the data accessing, expantion
register address control register increments address automatically. Then, next address data writing is
possible.
Expantion register access registers are shown in Figure 2.15.5, expansion register access block dia-
gram is shown in Figure 2.15.6, and expansion register bit compositions are shown in p153 to 163.
Expansion register address control register
b15
b8 b7
b5
b0
Symbol
DA
Address
021616
When reset
000016
Function
Specify accessing expansion register address
Setting possible value R W
0016 to 2216
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to
be indeterminated.
Expansion register address auto increments set
0:vaid / 1:invaid (Note2)
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to
be indeterminated.
Note1 : When access to expansion register, must be set expansion register address
at first, then use expansion register data control register (021816).
Note2 : When bit 8 = “0” setting,expansion register data control register increments by
accessing expansion register data control register,so it is not neccesary to
setting the next expansion register address.When bit 8 = “1” setting, the address
is fixed.
Expansion register data control register
b15
b8 b7
b0
Symbol
DD
Address
021816
When reset
000016
Function
Setting possible value R W
Write and read out the data of expansion register which is
specified by expansion register address control register
(address 021616)
000016 to FFFF16
Note : Data access must be 16-bit unit. 8-bit unit access is disable.
Figure 2.15.5 Expansion register access registers composition
Data bus (16-bit)
(address 021616) (DA8)
Expansion register address
control register (5) (DA5 to DA0)
Expansion register data control
register (16) (DD15 to DD0)
(address 021816)
Increment automatically
after data access
Expansion register
Figure 2.15.6 Expansion register access block diagram
152
Rev. 1.0