XS1-L02A-QF124-I5 XMOS, XS1-L02A-QF124-I5 Datasheet - Page 14

• 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
Note that the HELLO token is encoded in such a manner that an out-of-sync
transmission over 2-wires will not result in a HELLO token, but in some other
token. (A HELLO is transmitted as 1110011010.)
3.2.2 Initialising a LLink comprising a single power and reset domain
On start-up, the credit counters are always zero. The boot-ROM enables all
dedicated links (links E-H), and if boot-over-link is enabled it also enables link D.
If data needs to be transferred over a link, (say processor X wants to boot pro-
cessor Y), processor X must ensure that it has credits. It does this by writing
’1’ to the bit that issues a HELLO, establishing an upstream (half-duplex) link.
If bi-directional communication is required, processor X can initialise the other
side (by using a control message over the established half-duplex link), or the
booted code can initialise the other side. The register used to write a HELLO
token is listed in Section
3.2.3 Initialising a LLink comprising a hot plug
If hot-plugging is required, links shall be set to non-routed mode in software,
a software layer shall first enable the link, then repeatedly issue HELLO until it
establishes a link by reading the ”credits issued” bit. The software waits between
issuing RESETs and HELLOs. The register used to write a HELLO token, and
used to check for credits is listed in Section 9.3.
3.2.4 Initialising a LLink comprising master and slave domains
If a master is controlling the power-supply of one or more slave-nodes, the mas-
ter knows that the slave is in a known state when booted. When the master
knows that the slave is up it will enable the link and issue a HELLO.
XS1-L S
Name
CREDIT8
CREDIT64
CREDIT16
HELLO
YSTEM
Value
0xe0
0xe1
0xe4
0xe6
S
PECIFICATION
Description
Give additional 8 tokens of credit.
Give additional 64 tokens of credit.
Give additional 16 tokens of credit.
Solicit CREDIT
9.3
(0.9)
2008/08/25
13/40