isp1760 NXP Semiconductors, isp1760 Datasheet - Page 59

• Manufacturer Part Number: isp1760
• Description: Hi-speed Universal Serial Bus Host Controller For Embedded Applications
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 65:
9397 750 13257
Product data sheet
Bit
DW7
63 to 32
DW6
31 to 0
DW5
63 to 32
DW4
31 to 6
5
4 to 0
DW3
63
62
61
60
59
58
57
56 to 55
54 to 51
50 to 47
High-speed bulk IN and OUT, QHA: bit description
Symbol
reserved
reserved
reserved
reserved
J
NextPTDPointer
[4:0]
A
H
B
X
reserved
P
DT
Cerr[1:0]
NakCnt[3:0]
reserved
Access
-
-
-
-
SW — writes
SW — writes
SW — sets
HW — resets
HW — writes
HW — writes
HW — writes
-
HW — writes
HW — updates
SW — writes
HW — writes
SW — writes
HW — writes
SW — writes
-
Rev. 01 — 8 November 2004
Description
-
-
-
0; not applicable for QHA.
Jump:
0 — To increment the PTD pointer
1 — To enable the next PTD branching.
Next PTD Counter: Next PTD branching assigned by the PTD pointer.
Active: Write the same value as that in V.
Halt: This bit correspond to the Halt bit of the Status field of QH.
Babble: This bit correspond to the Babble Detected bit in the Status
field of the iTD, SiTD or QH.
1 — When babbling is detected, A and V are set to 0.
Error: This bit corresponds to the Transaction Error bit in the Status
field of iTD, SiTD or QH (Exec_Trans, the signal name is xacterr).
0 — No PID error.
1 — If there are PID errors, this bit is set active. The A and V bits are
also set to inactive. This transaction is retried three times.
-
Ping: For high-speed transactions, this bit corresponds to the Ping
state bit in the Status field of a QH.
0 — Ping is not set.
1 — Ping is set.
Software sets this bit to 0.
Data Toggle: This bit is filled by software to start a PTD. If
NrBytesToTransfer[14:0] is not complete, software needs to read this
value and then write back the same value to continue.
Error Counter. This field corresponds to the Cerr[1:0] field in QH. The
default value of this field is zero for isochronous transactions.
00 — The transaction will not retry.
11 — The transaction will retry three times. Hardware will decrement
these values. When the transaction has tried three times, X error will
be updated.
NAK Counter. This field corresponds to the NAKCnt field in QH.
Software writes for the initial PTD launch. The V bit is reset if NakCnt
decrements to zero and RL is a non-zero value. It reloads from RL if
transaction is ACKed.
-
Embedded Hi-Speed USB host controller
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
ISP1760
59 of 105