參數(shù)資料
型號: ISP1581
廠商: NXP Semiconductors N.V.
英文描述: Universal Serial Bus 2.0 high-speed interface device
中文描述: 通用串行總線2.0高速接口設(shè)備
文件頁數(shù): 41/73頁
文件大?。?/td> 1819K
代理商: ISP1581
Philips Semiconductors
ISP1581
USB 2.0 HS interface device
Objective specification
Rev. 02 — 23 October 2000
41 of 73
9397 750 07648
Philips Electronics N.V. 2000. All rights reserved.
9.5.6
Test Mode register (address: 84H)
This 1-byte register allows the firmware to set the (D
+
, D
)
lines to predetermined
states for testing purposes. The bit allocation is given in
Table 68
.
Remark:
Only one bit can be set at a time.
Table 66: Unlock Device register: bit allocation
Bit
15
Symbol
Reset
Bus reset
Access
Bit
7
Symbol
Reset
Bus reset
Access
14
13
12
11
10
9
8
ULCODE[15:8] = AAH
not applicable
not applicable
W
4
ULCODE[7:0] = 37H
not applicable
not applicable
W
6
5
3
2
1
0
Table 67: Unlock Device register: bit description
Bit
Symbol
15 to 0
ULCODE[15:0]
Description
Writing data AA37H unlocks the internal registers and FIFOs
for writing, following a ‘resume’.
Table 68: Test Mode register: bit allocation
Bit
7
Symbol
FORCEHS
Reset
0
Bus reset
0
Access
R/W
6
5
4
3
2
1
0
PHYTEST
0
0
R/W
LPBK
0
0
R/W
FORCEFS
0
0
R/W
PRBS
0
0
R/W
KSTATE
0
0
R/W
JSTATE
0
0
R/W
SE0_NAK
0
0
R/W
Table 69: Test Mode Register: bit description
Bit
Symbol
7
FORCEHS
Description
A logic 1 forces the hardware to high-speed mode only and
disables the chirp detection logic.
A logic 1 initiates an internal hardware test of the transceiver.
After successful completion the PHYTEST bit reverts to logic 0.
A logic 1 selects loop-back mode. All data written to TX/IN FIFO
of endpoint 1 is copied into RX/OUT of endpoint 1.
A logic 1 forces the physical layer to full-speed mode only and
disables the chirp detection logic.
A logic 1 sets the (D
+,
D
) lines to toggle in a pre-determined
random pattern.
Writing a logic 1 sets the (D
+,
D
) lines to the K state.
Writing a logic 1 sets the (D
+,
D
) lines to the J state.
Writing a logic 1 sets the (D
+,
D
) lines to a HS quiescent state.
The device only responds to a valid HS IN token with a NAK.
6
PHYTEST
5
LPBK
4
FORCEFS
3
PRBS
2
1
0
KSTATE
JSTATE
SE0_NAK
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