EP9312-CB Cirrus Logic Inc, EP9312-CB Datasheet - Page 431

• Manufacturer Part Number: EP9312-CB
• Description: System-on-Chip Processor
• Manufacturer: Cirrus Logic Inc
• Series: EP9r

Specifications of EP9312-CB

• Peak Reflow Compatible (260 C): No
• A/d Converter: 12 Bits
• Leaded Process Compatible: No
• No. Of I/o Pins: 65
• Package / Case: 352-BGA
• Core Processor: ARM9
• Core Size: 16/32-Bit
• Speed: 200MHz
• Connectivity: EBI/EMI, EIDE, Ethernet, I²C, IrDA, Keypad/Touchscreen, 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
• Processor Series: EP93xx
• Core: ARM920T
• Data Bus Width: 32 bit
• 3rd Party Development Tools: MDK-ARM, RL-ARM, ULINK2
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Program Memory Size: -
• Lead Free Status / Rohs Status: No
• Other names: 598-1257

STATUS
DS785UM1
31
15
Address:
Definition:
Bit Descriptions:
RSVD
30
14
DREQS
29
13
NB
28
12
Channel Base Address + 0x000C - Read/Write
This is the channel status register, used to provide status information with
respect to the DMA channel. All register bits are read-only except for the
DREQS status bit which can be cleared by a write (either a “0” or a “1”) to this
register.
Write this location once to clear the interrupt (see Interrupt Register Bit
Descriptions for which bits this rule applies to).
RSVD:
Stall:
NFB
27
11
26
10
EOTS
Copyright 2007 Cirrus Logic
25
9
Reserved. Unknown During Read.
A “1” indicates channel is stalled and cannot currently
transfer data because the START bit has not been
programmed or an external device has not asserted
DREQ. When the channel is first enabled, the Stall bit is
suppressed until the first buffer has been transferred, that
is, no stall interrupt generated when STALL state entered
from IDLE state, only when entered from MEM_WR State.
The STALL state can be cleared by:
•Setting the START bit
•An external peripheral requesting service (depending on
•Disabling the DMA channel
•A request from SSP or IDE
transfer mode)
24
8
RSVD
TCS
23
7
DONE
22
6
21
5
20
4
CurrentState
19
3
EP93xx User’s Guide
18
2
DMA Controller
17
1
STALL
10-37
16
0
10