The internal E clock is first divided by 2" />
參數(shù)資料
型號: MCHC11F1CFNE2
廠商: Freescale Semiconductor
文件頁數(shù): 122/158頁
文件大?。?/td> 0K
描述: IC MCU 512 EEPROM 68-PLCC
標(biāo)準(zhǔn)包裝: 18
系列: HC11
核心處理器: HC11
芯體尺寸: 8-位
速度: 2MHz
連通性: SCI,SPI
外圍設(shè)備: POR,WDT
輸入/輸出數(shù): 30
程序存儲器類型: ROMless
EEPROM 大?。?/td> 512 x 8
RAM 容量: 1K x 8
電壓 - 電源 (Vcc/Vdd): 4.75 V ~ 5.25 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x8b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 68-LCC(J 形引線)
包裝: 管件
RESETS AND INTERRUPTS
MC68HC11F1
5-4
TECHNICAL DATA
CR[1:0] — COP Timer Rate Select
The internal E clock is first divided by 215 before it enters the COP watchdog system.
These control bits determine a scaling factor for the watchdog timer. Refer to Table 5-
5.1.6 CONFIG Register
P indicates a previously programmed bit. P(L) indicates that the bit resets to the logic
level held in the latch prior to reset, but the function of COP is controlled by DISR in
TEST1 register.
EE[3:0] — EEPROM Mapping Control
Bit 3 — Not implemented
Always reads one
NOCOP — COP System Disable
0 = COP system enabled (forces reset on time-out)
1 = COP system disabled
Bit 1 — Not implemented
Always reads one
EEON — EEPROM Enable
5.2 Effects of Reset
When a reset condition is recognized, the internal registers and control bits are forced
to an initial state. Depending on the cause of the reset and the operating mode, the
reset vector can be fetched from any of six possible locations. Refer to Table 5-2.
These initial states then control on-chip peripheral systems to force them to known
start-up states, as follows:
CONFIG — System Configuration Register
$103F
Bit 7
654321
Bit 0
EE3
EE2
EE1
EE0
NOCOP
EEON
RESET:
11111
P
11
Single Chip
11111
P(L)
1
Bootstrap
P
P1P1P
Expanded
PPPP
1
P(L)
1
0
Special Test
Table 5-2 Reset Cause, Operating Mode, and Reset Vector
Cause of Reset
Normal Mode Vector
Special Test or Bootstrap
POR or RESET Pin
$FFFE, FFFF
$BFFE, $BFFF
Clock Monitor Failure
$FFFC, FFFD
$BFFC, $BFFD
COP Watchdog Time-out
$FFFA, FFFB
$BFFA, $BFFB
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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