DEMO9S12XEP100 Freescale Semiconductor, DEMO9S12XEP100 Datasheet - Page 969

BOARD DEMO FOR MC9S12XEP100

DEMO9S12XEP100

Manufacturer Part Number
DEMO9S12XEP100
Description
BOARD DEMO FOR MC9S12XEP100
Manufacturer
Freescale Semiconductor
Type
MCUr
Datasheet

Specifications of DEMO9S12XEP100

Contents
Board, Cables, CD
Processor To Be Evaluated
MC9S12XEP100
Data Bus Width
16 bit
Interface Type
RS-232
Silicon Manufacturer
Freescale
Core Architecture
S12
Core Sub-architecture
S12
Silicon Core Number
MC9S12
Silicon Family Name
S12XE
Rohs Compliant
Yes
For Use With/related Products
MC9S12XEP100
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
DEMO9S12XEP100
Manufacturer:
PANASONIC
Quantity:
46 000
Part Number:
DEMO9S12XEP100
Manufacturer:
Freescale Semiconductor
Quantity:
135
26.3.2.2
The FSEC register holds all bits associated with the security of the MCU and Flash module.
All bits in the FSEC register are readable but not writable.
During the reset sequence, the FSEC register is loaded with the contents of the Flash security byte in the
Flash configuration field at global address 0x7F_FF0F located in P-Flash memory (see
indicated by reset condition F in
phrase containing the Flash security byte during the reset sequence, all bits in the FSEC register will be
set to leave the Flash module in a secured state with backdoor key access disabled.
Freescale Semiconductor
KEYEN[1:0]
RNV[5:2}
SEC[1:0]
Offset Module Base + 0x0001
Reset
2. FDIV shown generates an FCLK frequency of 1.05 MHz
Field
7–6
5–2
1–0
W
R
Backdoor Key Security Enable Bits — The KEYEN[1:0] bits define the enabling of backdoor key access to the
Flash module as shown in
Reserved Nonvolatile Bits — The RNV bits should remain in the erased state for future enhancements.
Flash Security Bits — The SEC[1:0] bits define the security state of the MCU as shown in
Flash module is unsecured using backdoor key access, the SEC bits are forced to 10.
Flash Security Register (FSEC)
F
7
KEYEN[1:0]
= Unimplemented or Reserved
F
6
1. Preferred KEYEN state to disable backdoor key access.
KEYEN[1:0]
Figure 26-6. Flash Security Register (FSEC)
MC9S12XE-Family Reference Manual , Rev. 1.23
00
01
10
11
Figure
Table 26-10. FSEC Field Descriptions
Table
Table 26-11. Flash KEYEN States
F
5
26-11.
26-6. If a double bit fault is detected while reading the P-Flash
Status of Backdoor Key Access
F
4
RNV[5:2]
Description
DISABLED
DISABLED
DISABLED
ENABLED
Chapter 26 384 KByte Flash Module (S12XFTM384K2V1)
F
3
(1)
F
2
F
1
Table
Table
SEC[1:0]
26-12. If the
26-3) as
F
0
969

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