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| 型號： | ML674000 |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | CMOS 32-Bit ARM-Based General-Purpose Single-Chip Microcontroller(基于ARM的32位CMOS單片機(jī)) |
| 中文描述： | 的CMOS 32位基于ARM通用單芯片微控制器（基于ARM公司的32位的CMOS單片機(jī)） |
| 文件頁數(shù)： | 16/42頁 |
| 文件大?。?/td> | 529K |
| 代理商： | ML674000 |
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PEDL674000-02
OKI Semiconductor
ML674000
14/38
External memory controller
Controls access of externally connected devices such as ROM (FLASH), SRAM, SDRAM (EDO DRAM) and
IO devices.
(1)
ROM (FLASH) access function
Supports 16-bit device
Supports FLASH memory:
Access timing setting
SRAM access function
Supports 16-bit device
Supports asynchronous SRAM
Access timing setting
DRAM access function
Supports 16-bit device
Supports EDO/SDRAM:
Access timing setting
External IO access function
Supports 8-bit/16-bit device
Supports 2 banks independently
Supports external wait input: XWAIT (IO bank 0 only)
Access timing setting (for each bank)
Byte write (can be written only by IF equivalent to SRAM).
(2)
(3)
Simultaneous connections to EDO-DRAM and SDRAM cannot be made.
(4)
Power Management
HALT and STOP functions are supported as power save functions.
(1)
HALT mode
HALT object
CPU, internal RAM, AHB bus control
HALT mode setting: Set by the system control register.
HALT mode cancelling: Reset, interrupt
STOP mode
Stops the clock of entire LSI.
STOP mode setting: Specified by the system control register.
STOP mode cancelling: Reset, external interrupt (other than FIQ)
(2)
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