MC56F8257MLH Freescale Semiconductor, MC56F8257MLH Datasheet - Page 598

• Manufacturer Part Number: MC56F8257MLH
• Description: DSC 64K FLASH 60MHZ 64-LQFP
• Manufacturer: Freescale Semiconductor
• Series: 56F8xxxr

Specifications of MC56F8257MLH

• Core Processor: 56800E
• Core Size: 16-Bit
• Speed: 60MHz
• Connectivity: CAN, I²C, LIN, SCI, SPI
• Peripherals: LVD, POR, PWM, WDT
• Number Of I /o: 54
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Ram Size: 4K x 16
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Data Converters: A/D 16x12b, D/A 1x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 64-LQFP
• Product: DSCs
• Processor Series: 56800E
• Core: 56800E
• Device Million Instructions Per Second: 60 MIPs
• Maximum Clock Frequency: 60 MHz
• Number Of Programmable I/os: 54
• Data Ram Size: 8 KB
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 12 bit, 8 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

Memory Map and Registers
The top four words contain the back-door access key, which the user can program. To
unsecure the device, the correct key must be written to this four-word location. Refer to
Back Door
One word contains flash program/erase protection (PROT_VALUE) loaded into the flash
protection register upon device reset. The entire flash array is divided into 16 sections.
Each bit of the HFM protection register protects one of the sections. The user can modify
the protection register to protect/unprotect the sections of the flash array.
The security words (SECH_VALUE and SECL_VALUE) are loaded into the security
registers high and low upon reset. The location 0x7FF8 (SECH_VALUE) contains user-
programmed information to enable/disable the back-door access scheme. Programming 1
and 0 into location 0x7FF7 (SECL_VALUE), bits 1 and 0, will secure the device. If other
bit-value combinations are programmed into these two bits, the device will be unsecured
after reset.
20.2
598
offset (hex)
0x7FF8
0x7FF7
Address
Address
0
1
Memory Map and Registers
HFM_CLKD
Register
HFM_CR
name
Access.
When "w1c" appears in the write row for a bit, it means "write
1 to clear": you must write 1 to the bit to clear it.
Table 20-1. Flash Configuration Field Arrangement (continued)
Size (Bytes)
R
W
R
W
2
2
15
15
MC56F825x/4x Reference Manual, Rev. 2, 10/2010
14
14
13
13
(see the description of the HFM security register
(see the description of the HFM security register
0
12
12
0
Preliminary
11
11
NOTE
Security Word upper
Security Word lower
10
10
Description
high)
low)
0
9
9
8
8
7
7
6
6
5
5
4
4
Freescale Semiconductor
SECH_VALUE
SECL_VALUE
DIV[5:0]
Word Name
0
3
3
2
2
1
1
BTS
0
0