EP9307-CRZR Cirrus Logic Inc, EP9307-CRZR Datasheet - Page 79
EP9307-CRZR
Manufacturer Part Number
EP9307-CRZR
Description
IC Universal Platform ARM9 SOC Prcessor
Manufacturer
Cirrus Logic Inc
Series
EP9r
Specifications of EP9307-CRZR
Core Processor
ARM9
Core Size
16/32-Bit
Speed
200MHz
Connectivity
EBI/EMI, Ethernet, I²C, IrDA, Keypad/Touchscreen, SPI, UART/USART, USB
Peripherals
AC'97, DMA, I²:S, LCD, LED, MaverickKey, POR, PWM, WDT
Number Of I /o
14
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
272-LFBGA
Processor Series
EP93xx
Core
ARM920T
Data Bus Width
32 bit
3rd Party Development Tools
MDK-ARM, RL-ARM, ULINK2
Development Tools By Supplier
EDB9307A-Z
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
Lead Free Status / Rohs Status
Details
Other names
Q5809834A
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
EP9307-CRZR
Manufacturer:
Cirrus Logic Inc
Quantity:
10 000
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DS785UM1
3.2.2 Example 2
3.2.2.1 C Code
3.2.2.2 MaverickCrunch Assembly Language Instructions
The following function performs an FIR filter on the given input stream. The variable “data”
points to an array of floating point values to be filtered, “n” is the number of samples for which
the filter should be applied, “filter” is the FIR filter to be applied, and “m” is the number of taps
in the FIR filter. The “data” array must be “n + m - 1” samples in length, and “n” samples will
be produced.
void
ComputeFIR(float *data, int n, float *filter, int m)
{
}
ComputeFIR
outer_loop
inner_loop
loop
cfmul32 c0, c0, c3
cfsub32 c0, c0, c2
cfcmp32 r15, c0, c1
blt loop
cfstr32 c0, [r0, #0x0]
int i, j;
float sum;
for(i = 0; i < n; i++)
{
}
mov
mov
sum = 0;
for(j = 0; j < m; j++)
{
}
data[i] = sum;
mov
cfsub64 c0, c0, c0
cfcvt32s c0, c0
sum += data[i + j] * filter[j];
r1, r1, lsl #2
r3, r3, lsl #2
cfldrs
r12, r3
c2, [r0], #4
Copyright 2007 Cirrus Logic
; c0 < 10 ?
;
; c0 <= c0 * 5
; c0 <= c0 - 1
no, store result
; int_sum = 0;
;
; n *= 4
; m *= 4
; sum = float(int_sum);
; c2 = *data++;
; j = m * 4
yes
MaverickCrunch Co-Processor
EP93xx User’s Guide
3-9
3
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