S9S08DN32F1MLH Freescale Semiconductor, S9S08DN32F1MLH Datasheet - Page 55
![IC MCU 8BIT 32KB FLASH 64LQFP](/photos/39/70/397081/lqfp-64_sml.jpg)
S9S08DN32F1MLH
Manufacturer Part Number
S9S08DN32F1MLH
Description
IC MCU 8BIT 32KB FLASH 64LQFP
Manufacturer
Freescale Semiconductor
Series
HCS08r
Specifications of S9S08DN32F1MLH
Core Processor
HCS08
Core Size
8-Bit
Speed
40MHz
Connectivity
I²C, LIN, SCI, SPI
Peripherals
LVD, POR, PWM, WDT
Number Of I /o
53
Program Memory Size
32KB (32K x 8)
Program Memory Type
FLASH
Eeprom Size
1K x 8
Ram Size
1.5K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 16x12b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
64-LQFP
Processor Series
S08D
Core
HCS08
Data Bus Width
8 bit
Data Ram Size
1.5 KB
Interface Type
SCI, SPI
Maximum Clock Frequency
40 MHz
Number Of Programmable I/os
53
Number Of Timers
8
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWS08
Development Tools By Supplier
DEMO9S08DZ60
Minimum Operating Temperature
- 40 C
On-chip Adc
12 bit, 16 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
S9S08DN32F1MLH
Manufacturer:
Freescale Semiconductor
Quantity:
10 000
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which can be performed at the same time the Flash memory is programmed. The 1:0 state disengages
security; the other three combinations engage security. Notice the erased state (1:1) makes the MCU
secure. During development, whenever the Flash is erased, it is good practice to immediately program the
SEC0 bit to 0 in NVOPT so SEC = 1:0. This would allow the MCU to remain unsecured after a subsequent
reset.
The on-chip debug module cannot be enabled while the MCU is secure. The separate background debug
controller can be used for background memory access commands, but the MCU cannot enter active
background mode except by holding BKGD low at the rising edge of reset.
A user can choose to allow or disallow a security unlocking mechanism through an 8-byte backdoor
security key. If the nonvolatile KEYEN bit in NVOPT/FOPT is 0, the backdoor key is disabled and there
is no way to disengage security without completely erasing all Flash locations. If KEYEN is 1, a secure
user program can temporarily disengage security by:
The security key can be written only from secure memory (either RAM, EEPROM, or Flash), so it cannot
be entered through background commands without the cooperation of a secure user program.
The backdoor comparison key (NVBACKKEY through NVBACKKEY+7) is located in Flash memory
locations in the nonvolatile register space so users can program these locations exactly as they would
program any other Flash memory location. The nonvolatile registers are in the same 768-byte block of
Flash as the reset and interrupt vectors, so block protecting that space also block protects the backdoor
comparison key. Block protects cannot be changed from user application programs, so if the vector space
is block protected, the backdoor security key mechanism cannot permanently change the block protect,
security settings, or the backdoor key.
Security can always be disengaged through the background debug interface by taking these steps:
Freescale Semiconductor
1. Writing 1 to KEYACC in the FCNFG register. This makes the Flash module interpret writes to the
2. Writing the user-entered key values to the NVBACKKEY through NVBACKKEY+7 locations.
3. Writing 0 to KEYACC in the FCNFG register. If the 8-byte key that was written matches the key
1. Disable any block protections by writing FPROT. FPROT can be written only with background
2. Mass erase Flash if necessary.
3. Blank check Flash. Provided Flash is completely erased, security is disengaged until the next reset.
To avoid returning to secure mode after the next reset, program NVOPT so SEC = 1:0.
backdoor comparison key locations (NVBACKKEY through NVBACKKEY+7) as values to be
compared against the key rather than as the first step in a Flash program or erase command.
These writes must be performed in order starting with the value for NVBACKKEY and ending
with NVBACKKEY+7. STHX must not be used for these writes because these writes cannot be
performed on adjacent bus cycles. User software normally would get the key codes from outside
the MCU system through a communication interface such as a serial I/O.
stored in the Flash locations, SEC bits are automatically changed to 1:0 and security will be
disengaged until the next reset.
debug commands, not from application software.
MC9S08DN60 Series Data Sheet, Rev 3
Chapter 4 Memory
55
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