isp1161bm NXP Semiconductors, isp1161bm Datasheet - Page 106

• Manufacturer Part Number: isp1161bm
• Description: Isp1161 Full-speed Universal Serial Bus Single-chip Host And Device Controller
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 100: DcLock register: bit allocation
9397 750 09567
Product data
Bit
Symbol
Reset
Access
Bit
Symbol
Reset
Access
15
W
W
1
7
0
13.3.2 Unlock device (B0H)
13.3.3 DcScratch Register (R/W: B3H/B2H)
Table 99:
This command unlocks ISP1161’s DC from write-protection mode after a ‘resume’. In
‘suspend’ state all registers and FIFOs are write-protected to prevent data corruption
by external devices during a ‘resume’. Also, the register access for reading is possible
only after the ‘Unlock Device’ command is executed.
After waking up from ‘suspend’ state, the firmware must unlock the registers and
FIFOs via this command, by writing the unlock code (AA37H) into the DcLock
register. The bit allocation of the DcLock register is given in
Code (Hex): B0 — unlock the device
Transaction — write 1 word (unlock code)
Table 101: DcLock register: bit description
This command accesses the 16-bit DcScratch register, which can be used by the
firmware to save and restore information, e.g., the device status before powering
down in ‘suspend’ state.
The register bit allocation is given in
Error code
(Binary)
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Bit
15 to 0
14
W
W
0
6
0
Transaction error codes
Symbol
UNLOCK[15:0]
Description
time-out error
babble error
unexpected end-of-packet
sent or received NAK (Not AcKnowledge)
sent Stall; a token was received, but the endpoint was stalled
overflow; the received packet was larger than the available buffer space
sent empty packet (ISO only)
bit stuffing error
sync error
wrong (unexpected) toggle bit in DATA PID; data was ignored
13
W
W
1
5
1
Rev. 02 — 13 December 2002
UNLOCKH[7:0] = AAH
UNLOCKL[7:0] = 37H
Full-speed USB single-chip host and device controller
Sending data AA37H unlocks the internal registers and FIFOs
12
Description
for writing, following a ‘resume’.
W
W
0
4
1
…continued
Table
11
W
W
1
3
0
102.
10
W
W
0
2
1
© Koninklijke Philips Electronics N.V. 2002. All rights reserved.
Table
W
W
100.
9
1
1
1
ISP1161
106 of 137
W
W
8
0
0
1