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MC68HC11E1CFN2 Datasheet(PDF) 51 Page - Motorola, Inc

Part # MC68HC11E1CFN2
Description  Microcontrollers
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Manufacturer  MOTOROLA [Motorola, Inc]
Direct Link  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

MC68HC11E1CFN2 Datasheet(HTML) 51 Page - Motorola, Inc

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Operating Modes and On-Chip Memory
Memory Map
M68HC11E Family — Rev. 5
Data Sheet
MOTOROLA
Operating Modes and On-Chip Memory
51
REG[3:0] — 64-Byte Register Block Position
These four bits specify the upper hexadecimal digit of the address for the
64-byte block of internal registers. The register block, positioned at the
beginning of any 4-Kbyte page in the memory map, is initialized to address
$1000 out of reset. Refer to Table 2-5.
2.3.3.3 System Configuration Options Register
The 8-bit, special-purpose system configuration options register (OPTION) sets
internal system configuration options during initialization. The time protected
control bits, IRQE, DLY, and CR[1:0], can be written only once after a reset and
then they become read-only. This minimizes the possibility of any accidental
changes to the system configuration.
Table 2-4. RAM Mapping
Table 2-5. Register Mapping
RAM[3:0]
Address
REG[3:0]
Address
0000
$0000–$0xFF
0000
$0000–$003F
0001
$1000–$1xFF
0001
$1000–$103F
0010
$2000–$2xFF
0010
$2000–$203F
0011
$3000–$3xFF
0011
$3000–$303F
0100
$4000–$4xFF
0100
$4000–$403F
0101
$5000–$5xFF
0101
$5000–$503F
0110
$6000–$6xFF
0110
$6000–$603F
0111
$7000–$7xFF
0111
$7000–$703F
1000
$8000–$8xFF
1000
$8000–$803F
1001
$9000–$9xFF
1001
$9000–$903F
1010
$A000–$AxFF
1010
$A000–$A03F
1011
$B000–$BxFF
1011
$B000–$B03F
1100
$C000–$CxFF
1100
$C000–$C03F
1101
$D000–$DxFF
1101
$D000–$D03F
1110
$E000–$ExFF
1110
$E000–$E03F
1111
$F000–$FxFF
1111
$F000–$F03F
Address: $1039
Bit 7
654321
Bit 0
Read:
ADPU
CSEL
IRQE(1)
DLY(1)
CME
CR1(1)
CR0(1)
Write:
Reset:
00010000
1. Can be written only once in first 64 cycles out of reset in normal modes or at any time during
special modes.
= Unimplemented
Figure 2-13. System Configuration Options Register (OPTION)
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com


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