XS1-L02A-QF124-I5 XMOS, XS1-L02A-QF124-I5 Datasheet - Page 26

• Manufacturer Part Number: XS1-L02A-QF124-I5
• Description: IC MPU 32BIT DUAL CORE 124QFN
• Manufacturer: XMOS

Specifications of XS1-L02A-QF124-I5

• Processor Type: XCore 32-Bit
• Speed: 500MHz
• Voltage: 0.95 V ~ 1.05 V
• Mounting Type: Surface Mount
• Package / Case: 124-TFQFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -
• Other names: 880-1031

XMOS
4 Selecting the oscillator frequency
The XS1-L needs an oscillator as a clock source. It can work using clocks in the
range of 4.23 MHz to 100 MHz. Internally, a PLL is used to increase the clock
frequency to 400 MHz; this is the core frequency used to run the processor
data path and the switch. The 400 MHz is divided by 4 to derive the 100 MHz
reference clock.
Two pins, MODE1 and MODE0, are used to select one of four standard oscillator
frequencies (f
If required, any other oscillator frequency in the range 4.22 - 100 MHz can be
used as the clock source. In that case, the boot software must reprogram the
PLL multiplier/dividers to get a core frequency of (close to) 400 MHz. Depending
on the oscillator frequency one of the four modes is selected using MODE1 and
MODE0, which results in the following power-up core frequencies:
The above table also lists the values of OD, F and R, which are the registers
that define the ratio of the core frequency to the oscillator frequency:
OD, F and R must be chosen so that both F
F
writing to register 6 in the interconnect. R must be in the range 0...63, F must
be in the range 0...4095, and OD in the range 0...7.
XS1-L S
4.23-13 MHz
osc
48-100 MHz
13-20 MHz
20-48 MHz
F +1
YSTEM
2
F
osc
osc
R+1
S
1
): 13, 20, 48, or 100 MHz:
MODE [1:0]
00
11
10
01
PECIFICATION
F
100 MHz
core
1.3GHz. The OD, F , and R values can be modified by
13 MHz
20 MHz
48 MHz
F
= F
osc
osc
(0.9)
130-399.75 MHz
166.67-400 MHz
MODE [1:0]
00
11
10
01
260-400 MHz
196-400 MHz
F + 1
2
R + 1
F
core
1
399.75 MHz
core
400 MHz
400 MHz
400 MHz
PLL ratio
OD + 1
400MHz and 260MHz
F
30.75
8.333
1
core
20
4
OD
1
2
2
2
2008/08/25
122
119
49
23
F
25/40
R
0
0
0
0