XS1-L02A-QF124-I5 XMOS, XS1-L02A-QF124-I5 Datasheet - Page 10

• 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
After transmitting one token, none, two, or four wires are high. Wires are only
returned to zero when a message is completed (when data is streamed wires
do not return to zero). To return to zero, a sequence of an END token and an
optional return-to-zero-NOP are transmitted. They are chosen so that after them
all wires are low.
There are sixteen possible sequences to transmit an END token on the 5-wire
LLink. All of them signal END; but by choosing the appropriate sequence, it can
be guaranteed that none, one, or two of wires “0” to “3” are left high. After the
END token, one of the NOP tokens may have to be transmitted in order to return
the final wires to zero.
For example, to send an end-of-message after the control token sent earlier
(wires “0”, “1”, “2”, and “4” are high), transmit the following:
XS1-L S
4. Set wire “4” to high (signals an escape, bits control token bits 6 and 7 are
1. Set wire “4” to low (signals an escape).
first
e
e
e
e
e
v
e
e
• If wire “4” is high after the END token, the NOPE token is transmitted, and
• If wire “4” is low after the END token, the NOPD token is transmitted. The
0)
the final transition is chosen to return the last high wire low (note that if
wire “4” is high, exactly one of wires “0”... “3” must be high).
NOPD token has two transitions on wire “4” and hence leaves wire “4” low.
The two v transitions are chosen to return the final two wires to low.
YSTEM
second third
e
0
1
2
3
v
v
3
Transitions
S
PECIFICATION
v
e
e
e
e
e
v
3
fourth
v
0
1
2
3
e
e
v
(0.9)
Use
END tokens
CREDIT8 token
CREDIT64 token
HELLO token
CREDIT32 token
PAUSE tokens
NOPD tokens
NOPE tokens (control tokens 252...255)
2008/08/25
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