MCF51EM256CLL Freescale Semiconductor, MCF51EM256CLL Datasheet - Page 396

• 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

Independent Robust Real Time Clock (IRTC)
17.5.5
The month and year alarm register is used to configure the month and year setting of the alarm. The alarm
setting can be read or written anytime. This register is reset to its default state on software reset. Alarm
interrupt bit is set when all values of alarm seconds, minutes, hours, days, month and year match their
respective counter values.
17-12
ALM_MONTH
ALM_YEAR
Reset Value
Reset Value
IRTC_ALM_YRMON
Field
Field (bcd)
Field (bcd)
15–8
7–4
3–0
Field (bin)
Field (bin)
Bit Type
Bit Type
IRTC Year & Month Alarm Register (IRTC_ALM_YRMON)
MCF51EM256 Series ColdFire Integrated Microcontroller Reference Manual, Rev. 8
Year Count Value. Indicates the offset in years from the base year (hard coded as 2112) and does not
show the actual year value. This is a signed value.
Valid Values: –128 to +127 (Base Year 2112 and if the value of YEAR bits is 0x10, the actual year will
be 2112 + 16 = 2128).
Reserved bits in Binary mode. Read returns zeros. In BCD mode, these are used.
Month Alarm Value. Valid Values: 1 – 12
‘1’ – January
‘2’ – February
‘3’ – March
‘4’ – April
‘5’ – May
‘6’ – June
Figure 17-6. IRTC Year & Month Alarm Register (IRTC_ALM_YRMON)
Bit 15
rsvd
Bit 7
rw
—
0
ALM_MONTHS (tens)
Table 17-6. IRTC_ALM_YRMON Field Descriptions
Value remains in binary as year indicates offset from base year
Bit 14
rsvd
Bit 6
rw
—
0
‘10’ – October
‘11’ – November
‘9’ – September
‘8’ – August
‘12’ – December
‘7’ – July
Bit 13
rsvd
Bit 5
rw
—
0
Year and Month Alarm Register
Bit 12
rsvd
Bit 4
ALM_YEAR
rw
—
0
Description
‘13’ to ‘15’ – Reserved. Should not
‘0’ – No match done.
Bit 11
Bit 3
rw
rw
0
0
ALM_MONTHS (units)
Bit 10
be used.
Bit 2
ALM_MONTH
rw
rw
0
0
Bit 9
Bit 1
rw
rw
0
0
Freescale Semiconductor
Bit 8
Bit 0
Offset: 0x08
rw
rw
0
0
0x08
0x09