參數(shù)資料
型號: UPD70433R-12
廠商: NEC Corp.
元件分類: 16位微控制器
英文描述: V55PITM 16-BIT MICROPROCESSOR
中文描述: V55PITM 16位微處理器
文件頁數(shù): 26/166頁
文件大?。?/td> 772K
代理商: UPD70433R-12
26
μ
PD70433
Figure 3-4. Extended Memory Space
Vector Area
Spaecial Function
Register Area
(Internal Area)
0 F F F F F H
1 0 0 0 0 0 H
0 0 0 0 0 H
0 0 3 F F H
F F E 0 0 H
F F F E F H
0 0 0 0 0 0 H
F F F F F F H
1M Bytes
16M Bytes
3.5.3
Special Function Register Area
The 496-byte space 0FFE00H to 0FFFEFH has mapped onto it a group of registers to which functions such as
on-chip peripheral hardware operation specification, status monitoring, etc., are assigned.
Program fetches cannot be performed from these areas.
Special function register manipulation is performed by accesses by means of memory manipulation instructions.
If the special function register area is accessed, RD, WRH, WRL, IORD, IOWR and other control signals do not become
active.
A list of special function registers is given in Table 3-5. The meaning of the items in the table is explained below.
Symbol............................ The symbol used to indicate the special function register name. Corresponds to the
operand description format (symbol name) in a memory manipulation instruction.
R/W................................. Indicates whether this special function register is read/write enabled.
R/W :
Read/write enabled
R
:
Read only
W
:
Write only
Manipulation Method ..... Indicates which of the following can be used on the register: bit manipulation,
8-bit manipulation, 16-bit manipulation, 32-bit manipulation.
RESET............................ Indicates the status of the register after RESET input.
Note
Addresses which are not listed are the reserved area, therefore, they should not be accessed by the user
program.
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