參數(shù)資料
型號(hào): MC68HC05E16CFB
廠商: MOTOROLA INC
元件分類: 微控制器/微處理器
英文描述: 16256 bytes of user ROM, 320bytes of EPROM and 352 bytes of RAM
中文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP44
封裝: QFP-44
文件頁數(shù): 69/96頁
文件大?。?/td> 3045K
代理商: MC68HC05E16CFB
MC68HC05SR3
Freescale
9-3
LOW POWER MODES
9
9.3
SLOW Mode
The SLOW mode function is controlled by the SM bit in the Miscellaneous Control Register. When
the SM bit is set, the internal bus clock is divided by 16, resulting to a frequency equal to the
oscillator frequency divide by 32. This feature permits a slow down of all the internal operations
and thus reduces power consumption — particularly useful while in WAIT mode. The SM bit is
automatically cleared while going to STOP mode.
SM — Slow Mode
1 (set)
Slow mode enabled. Internal bus frequency fOP=fOSC ÷ 32.
0 (clear) –
Slow mode disabled. Internal bus frequency fOP=fOSC ÷ 2.
9.4
Data-Retention Mode
If the Low Voltage Reset function is not enabled, the contents of RAM and CPU registers are
retained at supply voltages as low as 2Vdc. This is called the data-retention mode where the data
is held, but the device is not guaranteed to operate. The RESET pin must be held low during
data-retention mode.
The Low Voltage Reset Function is enabled/disabled by the LVRE bit in the Miscellaneous Control
Register ($0C).
LVRE — Low Voltage Reset Enable
1 (set)
Low Voltage Reset function enabled.
0 (clear) –
Low Voltage Reset function disabled.
Address bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
Miscellaneous Control Register
$0C
KBIE
KBIC
INTO
INTE LVRE
SM
IRQ2F IRQ2E 0001 0000
Address bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
State
on reset
Miscellaneous Control Register
$0C
KBIE
KBIC
INTO
INTE LVRE
SM
IRQ2F IRQ2E 0001 0000
TPG
69
05SR3.Book Page 3 Thursday, August 4, 2005 1:08 PM
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