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CHAPTER 21 FLASH MEMORY
[Bit 0]: LPM (Low power mode)
Bit 0 is used to enable the function for decreasing power consumption other than through
flash access during low-speed operation.
Setting this bit to 1 prevents the flash memory circuit from being started when the address is
changed.
Use the function of this bit only when the CPU operating frequency is less than or equal to
10 MHz.
•
At reset, this bit is initialized to 0.
•
This bit can both be read and written.
Wait register (FWTC)
FWTC controls flash memory wait in CPU mode.
It also controls high-speed read (33 MHz operation) access of flash memory.
The configuration of the FWTC is as follows:
[Bits 1 and 0]: WTC1 and WTC0
Bits 1 and 0 are used to control flash memory wait.
- 00: +0 wait, 2 cycles [initial value]
- 01: Cannot be used.
- 10: Cannot be used.
- 11: Cannot be used.
[Bit 2]: FACH
Bit 2 is used to control the flash macro read speed.
- 0: Reads flash macro at normal speed.
- 1: Reads flash macros at high speed (used in 33-MHz operation).
0
Normal status. CEX output becomes L regardless of whether flash memory is
accessed. [Initial value]
1
CXE output becomes L only when flash memory is accessed.
bit 7
(
)
bit 5
(
)
bit 4
(
)
bit 3
(
)
bit 2
FACH
W
(0)
bit 1
WTC1
R/W
(0)
bit 0
WTC0
R/W
(0)
0007C4 h
bit 6
(
)
Содержание MB91150 Series
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Страница 3: ...FUJITSU LIMITED FR30 32 BIT MICROCONTROLLER MB91150 Series HARDWARE MANUAL ...
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Страница 10: ...vi ...
Страница 112: ...96 CHAPTER 3 MEMORY SPACE CPU AND CONTROL UNIT ...
Страница 174: ...158 CHAPTER 5 I O PORTS Note DDRI bit 6 is a test bit Always set the bit to 0 The value read from this bit is always 0 ...
Страница 178: ...162 CHAPTER 5 I O PORTS ...
Страница 214: ...198 CHAPTER 7 16 BIT RELOAD TIMER ...
Страница 240: ...224 CHAPTER 8 PPG TIMER ...
Страница 310: ...294 CHAPTER 13 8 10 BIT A D CONVERTER ...
Страница 318: ...302 CHAPTER 14 8 BIT D A CONVERTER ...
Страница 362: ...346 CHAPTER 15 UART ...
Страница 420: ...404 CHAPTER 19 PERIPHERAL STOP CONTROL ...
Страница 428: ...412 CHAPTER 20 CALENDAR MACROS ...
Страница 503: ...487 INDEX INDEX The index follows on the next page This is listed in alphabetic order ...
Страница 510: ...494 INDEX ...
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