MCF5253CVM140 Freescale Semiconductor, MCF5253CVM140 Datasheet - Page 648

• Manufacturer Part Number: MCF5253CVM140
• Description: IC MPU 32BIT 140MHZ 225-MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: MCF525xr

Specifications of MCF5253CVM140

• Core Processor: Coldfire V2
• Core Size: 32-Bit
• Speed: 140MHz
• Connectivity: CAN, EBI/EMI, I²C, QSPI, UART/USART, USB OTG
• Peripherals: DMA, WDT
• Program Memory Type: ROMless
• Ram Size: 128K x 8
• Voltage - Supply (vcc/vdd): 1.08 V ~ 1.32 V
• Data Converters: A/D 6x12b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 225-MAPBGA
• Family Name: MCF5xxx
• Device Core: ColdFire V2
• Device Core Size: 32b
• Frequency (max): 140MHz
• Instruction Set Architecture: RISC
• Supply Voltage 1 (typ): 1.2/3.3V
• Operating Supply Voltage (max): 1.32/3.6V
• Operating Supply Voltage (min): 1.08/3V
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 225
• Package Type: MA-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of I /o: -
• Eeprom Size: -
• Program Memory Size: -
• Lead Free Status / Rohs Status: Compliant

Real-Time Clock
26.3.1
See
register.
26.3.2
The RTC_TIME register is used to read the amount of seconds that have passed since battery voltage has
been applied to the device. This register cannot be reset.
26.4
The real-time clock requires an external 32.768 kHz crystal to operate. From this crystal (via the
RTCCRIN and RTCCROUT pins), it will produce a free-running 32-bit counter, that increments with a
1-second tick.
26.4.1
When the real-time clock battery (RTC_VDD) goes low, the real-time clock may stop, and the RTC_TIME
value may become corrupt. To indicate the real-time clock has been in low battery state, it will set the
RTC_POWER_LOSS status bit in the ATA-DMA configuration register. This bit will remain set, until the
user sets the RTC_CLEAR bit in the ATA-DMA configuration register.
26-2
RTC_TIME
MBAR2 Offset
Field
31–0
Offset MBAR2 0x50C (RTC_TIME)
Reset –
0x50C
0x500
Chapter 22, “USB, ATA DMA, and Clock Integration Module”
W
R
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
Functional Description
Indicates the time in seconds since battery voltage was first applied to RTC_VDDA. This register can represent up
to 2
non-volatile memory and apply the offset to this value to convert RTC_TIME into a readable format.
Miscellaneous Configuration Register (MISCCR)
RTC Time Register (RTC_TIME)
Battery Removal Detection
– – – – – – – – – – – – – – – – – – – – – – – – – – – –
32
Miscellaneous Configuration Register
RTC Time Register (RTC_TIME)
seconds (~136 years). It is not possible to reset this value. The user must keep a real-time clock offset in
Table 26-3. RTC Time (RTC_TIME) Register Field Descriptions
Figure 26-2. RTC Time (RTC_TIME) Register
Register
Table 26-2. Real Time Clock Memory Map
MCF5253 Reference Manual, Rev. 1
RTC_TIME
Description
Access Reset Value
R/W
R
for a detailed description of this
Undefined
Undefined
9
8
7
Freescale Semiconductor
6
Access: User read-only
Section/Page
26.3.1/26-2
26.3.2/26-2
5
4
3
– – –
2
1
0