MCF51EM256CLL Freescale Semiconductor, MCF51EM256CLL Datasheet - Page 241

• Manufacturer Part Number: MCF51EM256CLL
• Description: IC MCU 32BIT 256KB FLASH 100LQFP
• Manufacturer: Freescale Semiconductor
• Series: MCF51EMr

Specifications of MCF51EM256CLL

• Core Processor: Coldfire V1
• Core Size: 32-Bit
• Speed: 50MHz
• Connectivity: I²C, SCI, SPI
• Peripherals: LCD, LVD, PWM, WDT
• Number Of I /o: 63
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 16x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 100-LQFP
• Processor Series: MCF51EM
• Core: ColdFire V1
• Data Bus Width: 32 bit
• Data Ram Size: 16 KB
• Interface Type: RS-232, LIN
• Maximum Clock Frequency: 50 MHz
• Number Of Timers: 3
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: JLINK-CF-BDM26, EWCF
• Development Tools By Supplier: DEMOEM
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

The basic ColdFire interrupt controller supports up to 63 request sources mapped as nine priorities for each
of the seven supported levels (7 levels × 9 priorities per level). Within the nine priorities within a level, the
mid-point is typically reserved for package-level IRQ inputs. The levels and priorities within the level
follow a descending order: 7 > 6 > ... > 1 > 0.
The HCS08 architecture supports a 32-entry exception vector table: the first two vectors are reserved for
internal CPU/system exceptions and the remaining are available for I/O interrupt requests. The
requirement for an exact match between the interrupt requests and priorities across two architectures
means the sources are mapped to a sparsely-populated two-dimensional ColdFire array of seven interrupt
levels and nine priorities within the level. The following association between the HCS08 and ColdFire
vector numbers applies:
The CF1_INTC performs a cycle-by-cycle evaluation of the active requests and signals the highest-level,
highest-priority request to the V1 ColdFire core in the form of an encoded interrupt level and the exception
vector associated with the request. The module also includes a byte-wide interface to access its
programming model. These interfaces are shown in the simplified block diagram of
Freescale Semiconductor
Number(s)
115–255
Vector
106
107
108
109
110
111
112
113
114
ColdFire Vector Number = 62 + HCS08 Vector Number
INTC_FRC[59]
INTC_FRC[60]
INTC_FRC[61]
INTC_FRC[62]
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
Interrupt
Number
Source
39
40
41
42
43
—
Table 10-2. MCF51EM256/128 Exception Vector Table (continued)
0x1CC–0x3FC
Address
Vector
0x1AC
0x1BC
Offset
0x1C0
0x1C4
0x1C8
0x1A8
0x1B0
0x1B4
0x1B8
Interrupt
Level
N/A
4
3
2
1
1
1
1
1
1
Priority
within
Level
N/A
0
0
0
0
5
4
3
2
1
Program
Stacked
Counter
Next
Next
Next
Next
Next
Next
Next
Next
Next
Next
Level 4 Software Interrupt
Level 3 Software Interrupt
Level 2 Software Interrupt
Level 1 Software Interrupt
Interrupt Controller (CF1_INTC)
Assignment
Reserved
Reserved
Reserved
Figure
FTSR1
FTSR2
LCD
10-1.
10-5