MCF5253VM140J Freescale Semiconductor, MCF5253VM140J Datasheet - Page 235

• Manufacturer Part Number: MCF5253VM140J
• Description: IC MCU 2.1MIPS 140MHZ 225MAPBGA
• Manufacturer: Freescale Semiconductor
• Series: MCF525xr

Specifications of MCF5253VM140J

• 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: -20°C ~ 70°C
• Package / Case: 225-MAPBGA
• Processor Series: MCF525x
• Core: ColdFire V2
• 3rd Party Development Tools: JLINK-CF-BDM26, EWCF
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Number Of I /o: -
• Eeprom Size: -
• Program Memory Size: -
• Lead Free Status / Rohs Status: Details

14.4.4
The byte count register (BCR) is a 24-bit register containing the number of bytes remaining to be
transferred for a given block. The offset within the memory map is based on the value of the BCR24BIT
bit in the MPARK register of the SIM module. See
The BCR decrements on the successful completion of the address phase of a write transfer in dual-address
mode. The amount the BCR decrements is 1, 2, 4, or 16 for byte, word, longword, or line accesses,
respectively.
Freescale Semiconductor
Address MBAR + $30C
Reset
Reset
W
W
R
R
MBAR + $34C
MBAR + $38C
MBAR + $3CC
BCR15 BCR14 BCR13 BCR12 BCR11 BCR10
Byte Count Register
31
15
–
0
The MCF5253 on-chip DMAs must be careful when transferring data to
cacheable memory since the on-chip DMAs do not maintain cache
coherency with the MCF5253 instruction cache.
If the BCR24BIT = 1, the upper 8 bits are loaded with zeros.
30
14
–
0
29
13
–
0
Figure 14-6. Byte Count Register (BCR)—BCR24BIT = 1
28
12
–
0
27
11
–
0
MCF5253 Reference Manual, Rev. 1
26
10
–
0
BCR9
25
–
0
9
NOTE
NOTE
Table 14-6
BCR8
24
–
0
8
BCR23 BCR22 BCR21 BCR20 BCR19 BCR18 BCR17 BCR16
BCR7
23
0
0
7
for the bit locations.
BCR6
22
0
0
6
BCR5
21
0
0
5
BCR4
20
0
4
0
BCR3
19
0
0
3
Access: User read/write
BCR2
18
0
0
2
DMA Controller
BCR1
17
0
0
1
BCR0
16
14-7
0
0
0