MCF5253CVM140 Freescale Semiconductor, MCF5253CVM140 Datasheet - Page 341

• 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

Upon request Freescale can supply example s/w code that implements the Frequency measurement and
controls the XTRIM output to allow CRIN to be locked to the EBU clock input.
The PLL maintaining phase relation between the incoming source signal and internal signal is mainly
digital. It is necessary, however, to measure the phase/frequency of the incoming signal in relationship with
the CRIN clock in order to be able to steer the sample rate convertor clock. The circuit shown in
Figure 17-24
Associated with the Frequency measurement block are two registers. (See
measure the frequency of the incoming clock by comparison with the audio CRIN clock (which is typically
16.93 MHz or 11.2896MHz). Multiplexer (1) selects the incoming clock source. Registers (2),(3), and xor
(4) are an edge detector. Multiplexer (5) is a by-pass for the IEC958 input. The rest of the circuit is a
second-order filter with a bandwidth of approximately 80 Hz. The output FreqMeas(31:0) is an unsigned
number, giving the frequency of the selected source as a function of the CRIN clock. The filter is calculated
internally in 48 bit precision. The 16 LSBs are not sent out.
The value read from the FreqMeas Register is calculated as follows:
Freescale Semiconductor
•
•
For measurement of the IIS inputs: FreqMeas = (IIS SCLK Freq × 2)/Faudio × (2 ** 15) × Gain
For measurement of the EBU input: FreqMeas = (EBU Freq) / Faudio × (2 ** 15) × Gain
MBAR2 + 0xA3
MBAR2 + 0xA8
Address
is used for maintaining this phase relationship.
Table 17-24. PhaseConfig and Frequency Measure Register Addresses
SCLK1
SCLK2
SCLK3
EBU-In
Select
CRIN
PhaseConfig
FreqMeas
Name
Figure 17-24. Frequency Measurement Circuit
15
1
6
11
MCF5253 Reference Manual, Rev. 1
Width
+
+
D
32
8
2
7
12
Phase Configuration (gain and source select)
sat
sat
13
8
3
D
9
Frequency measurement
D
14
D
Description
xor
4
FreqMeas[31:0]
10
5
Table
17-24). The circuit will
16
Audio Interface Module (AIM)
Access
R/W
R
17-43