EP9315-CB Cirrus Logic Inc, EP9315-CB Datasheet - Page 404

• Manufacturer Part Number: EP9315-CB
• Description: IC ARM920T MCU 200MHZ 352-PBGA
• Manufacturer: Cirrus Logic Inc
• Series: EP9r

Specifications of EP9315-CB

• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 200MHz
• Connectivity: EBI/EMI, EIDE, Ethernet, I²C, IrDA, Keypad/Touchscreen, PCMCIA, SPI, UART/USART, USB
• Peripherals: AC'97, DMA, I&sup2:S, LCD, LED, MaverickKey, POR, PWM, WDT
• Number Of I /o: 16
• Program Memory Type: ROMless
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.65 V ~ 3.6 V
• Data Converters: A/D 8x12b
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 352-BGA
• Processor Series: EP93xx
• Core: ARM920T
• Data Bus Width: 32 bit
• 3rd Party Development Tools: MDK-ARM, RL-ARM, ULINK2
• Development Tools By Supplier: EDB9315A-Z
• For Use With: 598-1144 - KIT DEVELOPMENT EP9315 ARM9
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Lead Free Status / Rohs Status: No
• Other names: 598-1261

10
10-10
10.1.10.1.1 DMA_IDLE
10.1.10.1.2 DMA_STALL
DMA Controller
EP93xx User’s Guide
10.1.10 M2M DMA Functional Description
10.1.10.1 M2M DMA Control Finite State Machine
BCR_EQ_BWC
Each DMA M2M channel is controlled by 2 finite state machines (FSM) which determine
whether the channel is transferring data to or from memory, which buffer from the double-
buffer descriptor set it is using, and whether it is currently generating an interrupt.
The DMA M2M Control FSM always resets to the DMA_IDLE state.
The DMA Control M2M FSM always enters the DMA_IDLE state when a channel is disabled
(CONTROL[3]).
The DMA Control M2M FSM exits the DMA_IDLE state and moves to the DMA_STALL state
when the ENABLE bit of the CONTROL register is set.
The DMA M2M Control FSM enters the DMA_STALL state when an M2M channel is enabled.
No STALL interrupt is generated for this condition.
The DMA M2M Control FSM enters the DMA_STALL state when a memory-to-memory
transfer has completed successfully. The DONE and STALL interrupts are generated for this
condition, if enabled.
DMA_BWC_WAIT
DMA_MEM_WR
DISABLE
Figure 10-2. M2M DMA Control Finite State Machine
DISABLE
RX_TFR_END
Copyright 2007 Cirrus Logic
RX_TFR_END
TX_TFR_END
DMA_IDLE
DISABLE
DISABLE
DMA_MEM_RD
ENABLE
DONE/DEOT
DMA_STALL
(START, DREQ,
or TXREQ)
and BCR_VALID
IDEREQ, RXREQ,
DS785UM1