MCF5270CAB100 Freescale Semiconductor, MCF5270CAB100 Datasheet - Page 531

• Manufacturer Part Number: MCF5270CAB100
• Description: MCU V2 COLDFIRE 64K SRAM 160-QFP
• Manufacturer: Freescale Semiconductor
• Series: MCF527xr

Specifications of MCF5270CAB100

• Core Processor: Coldfire V2
• Core Size: 32-Bit
• Speed: 100MHz
• Connectivity: EBI/EMI, Ethernet, I²C, SPI, UART/USART
• Peripherals: DMA, WDT
• Number Of I /o: 39
• Program Memory Type: ROMless
• Ram Size: 64K x 8
• Voltage - Supply (vcc/vdd): 1.4 V ~ 1.6 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 160-QFP
• Processor Series: MCF527x
• Core: ColdFire V2
• 3rd Party Development Tools: JLINK-CF-BDM26, EWCF
• Development Tools By Supplier: NNDK-MOD5272-KIT, NNDK-MOD5270-KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details

28.2.1.7 SKHA Key Size Register (SKKSR)
The 6-bit SKKSR is used to set the number of bytes in the key. For AES, this value is always 16
(0x10). For Single DES, the key size must be 8 bytes (0x08). For two key Triple-DES the value
should be 16 (0x10), while three key Triple-DES requires a key size of 24 bytes (0x18). The
SKKSR must be set after the key data is written. Once the key size is set, the contents of the key
register will be used to initialize the SKHA. If an illegal key size is specified, a key size error will
occur, setting SKESR[KSE] and triggering an interrupt to the interrupt controller if KSE is not
masked. If the key size is modified during message processing, a register modified error will be
generated, setting SKESR[RMDP] and triggering an interrupt to the interrupt controller if RMDP
is not masked.
28.2.1.8 SKHA Data Size Register (SKDSR)
The 32-bit SKDSR holds the number of bytes to process. This value is set prior to loading message
data. The SKHA internally decrements this value as it processes the message. The SKDSR may
be read at any time to determine the number of bytes that remain to be processed. This value may
be modified during message processing. The value written will be internally added to the current
value of data size. The SKHA will continue to process data until the value in SKDSR reaches zero.
Freescale Semiconductor
Address
Reset
W
W
R
R
R
31
15
0
0
0
Masking errors should only be used for debug purposes. A masked
error will most likely cause invalid data.
30
14
0
0
0
Figure 28-13. SKHA Key Size Register (SKKSR)
29
13
0
0
0
28
12
0
0
0
27
11
0
0
0
MCF5271 Reference Manual, Rev. 2
—
26
10
0
0
0
25
IPSBAR + 0x1B_0018
0
0
0
9
NOTE
24
0
0
0
8
23
0
0
0
7
22
0
0
6
0
21
0
0
0
5
20
0
0
0
4
Key Size in bytes
Memory Map/Register Definition
19
0
0
0
3
18
0
0
0
2
17
0
0
0
1
16
0
0
0
0
28-13