參數(shù)資料
型號(hào): M38049FFHKP
元件分類(lèi): 微控制器/微處理器
英文描述: 8-BIT, FLASH, 8.4 MHz, MICROCONTROLLER, PQFP64
封裝: 14 X 14 MM, 0.80 MM PITCH, PLASTIC, LQFP-64
文件頁(yè)數(shù): 96/116頁(yè)
文件大?。?/td> 1261K
代理商: M38049FFHKP
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Rev.1.01
Jan 25, 2005
page 80 of 114
REJ03B0131-0101Z
3804 Group (Spec. H)
Fig. 77 Block diagram of built-in flash memory
q Boot Mode
The control program for CPU rewrite mode must be written into
the User ROM or Boot ROM area in parallel I/O mode beforehand.
(If the control program is written into the Boot ROM area, the stan-
dard serial I/O mode becomes unusable.)
See Figure 77 for details about the Boot ROM area.
Normal microcomputer mode is entered when the microcomputer
is reset with pulling CNVSS pin low. In this case, the CPU starts
operating using the control program in the User ROM area.
When the microcomputer is reset and the CNVSS pin high after
pulling the P45/TxD1 pin and CNVss pin high, the CPU starts op-
erating (start address of program is stored into addresses FFFC16
and FFFD16) using the control program in the Boot ROM area.
This mode is called the “Boot mode”. Also, User ROM area can be
rewritten using the control program in the Boot ROM area.
q Block Address
Block addresses refer to the maximum address of each block.
These addresses are used in the block erase command.
q CPU Rewrite Mode
In CPU rewrite mode, the internal flash memory can be operated
on (read, program, or erase) under control of the Central Process-
ing Unit (CPU).
In CPU rewrite mode, only the User ROM area shown in Figure 77
can be rewritten; the Boot ROM area cannot be rewritten. Make
sure the program and block erase commands are issued for only
the User ROM area and each block area.
The control program for CPU rewrite mode can be stored in either
User ROM or Boot ROM area. In the CPU rewrite mode, because
the flash memory cannot be read from the CPU, the rewrite con-
trol program must be transferred to internal RAM area before it
can be executed.
SFR area
Internal RAM area
(2K bytes)
000016
004016
083F16
SFR area
Internal flash memory area
(60K bytes)
0FE016
RAM
FFFF16
0FFF16
100016
User ROM area
Data block B:
2K bytes
100016
180016
E00016
C00016
FFFF16
F00016
FFFF16
Boot ROM area
4K bytes
Notes 1: The boot ROM area can be rewritten in a paral-
lel I/O mode. (Access to except boot ROM
area is disablrd.)
2: To specify a block, use the maximum address
in the block.
Block 3: 24K bytes
200016
800016
Data block A:
2K bytes
Block 2: 16K bytes
Block 1: 8 K bytes
Block 0: 8 K bytes
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