Blue Technix CM-BF537E, Руководство пользователя по оборудованию, Страница: 10 / 28

CM ‐ BF537E ‐ Hardware User Manual
9
2 Specification
2.1 Functional Specification
Figure 2-1: Detailed Block Diagram
Figure 2-1 shows a detailed block diagram of the CM-BF537E module. Other than the SDRAM control pins the
CM-BF537E has all other pins of the Blackfin processor on its two main 60 pin connectors.
A special feature of the CM-BF537E Core Module is the on-board physical Ethernet transceiver from Micrel
(KSZ8041BL).
Dynamic voltage control allows reducing power consumption to a minimum adjusting the core voltage and
the clock frequency dynamically in accordance to the required processing power. A low voltage reset circuit
guarantees a power on reset and resets the system when the input voltage drops below 2.93V.
2.2 Boot Mode
By default the boot mode = 000 (BMODE2 = low, BMODE1 = low, BMODE0 = low). All BMODE pins have
internal pull down resistors.
Connect BMODE0 to Vcc and leave BMODE1, BMODE2 pins open for boot mode 001 equals to 8 or 16 bit
PROM/FLASH boot mode, this is the default boot mode of the Blacksheep software. See Blackfin Datasheets
or Eval/DevBoard manuals for more details.
32 MByte
SDRam
4 MByte
Flash
BF537
up to
600MHz
Dynamic
Core Voltage
Control
Low Voltage
Reset
20 Bit Address Bus
16 Bit Data Bus
Ethernet
Physical
Clock
Mem. Control, Boot Mode, JTAG, Ethernet
Data & Addr
es
s
Bus
Clock-out PPI, SPORT0, UART1, UART2, SPI, TWI, CAN, GPIO
3V3 Powe
r , Re
s
e
t