EP9315-IB Cirrus Logic Inc, EP9315-IB Datasheet - Page 12
![IC ARM920T MCU 200MHZ 352-PBGA](/photos/12/23/122388/ep9315-ib_sml.jpg)
EP9315-IB
Manufacturer Part Number
EP9315-IB
Description
IC ARM920T MCU 200MHZ 352-PBGA
Manufacturer
Cirrus Logic Inc
Series
EP9r
Specifications of EP9315-IB
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, I²: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
-40°C ~ 85°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
598-1262
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
EP9315-IBZ
Manufacturer:
CIRRUS
Quantity:
13
Company:
Part Number:
EP9315-IBZ
Manufacturer:
CIRRUS
Quantity:
347
12
Description 7
The coprocessor can incorrectly update one of its destination accumulators even if the coprocessor
instruction should not have been executed or is canceled by the ARM processor. This error can occur if the
following is true:
1) The first instruction must be a coprocessor compare instruction, one of cfcmp32, cfcmp64, cfcmps, and
2) The second instruction:
Example 1: In this case the second instruction may modify a2 even if the condition is not matched.
Example 2: In this case the second instruction may modify a2 even if an interrupt or exception causes it to
be canceled and re-executed after the interrupt/exception handler returns.
Workaround
The workaround for this issue is to insure that at least one other instruction appears between these
instructions. For example, possible fixes for the instructions sequences above are:
and
Description 8
If a data abort occurs on an instruction preceding a coprocessor data path instruction that writes to one of
the accumulators
For example:
The second instruction will update a0 even though it should be canceled due to the data abort on the
previous instruction.
cfcmp32
cfmva64ne
cfcmp32
cfmadda
cfcmp32
nop
cfmva64ne
cfcmp32
nop
cfmadda
str
cfmadda32
cfcmpd.
- has an accumulator as a destination
- does not execute
3
, the accumulator may be updated even though the instruction was canceled.
r15, c0, c5
a2, c8
r15, c0, c5
a2, a2, c0, c1
r15, c0, c5
a2, c8
r15, c0, c5
a2, a2, c0, c1
1
r7, [r0, #0x1d]
a0, a2, c0, c1
.
(Continued)
3
.
; assume this causes a data abort
ER638E2B