isp1181a NXP Semiconductors, isp1181a Datasheet - Page 38

• Manufacturer Part Number: isp1181a
• Description: Isp1181a Full-speed Universal Serial Bus Peripheral Controller
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Table 40:
9397 750 13959
Product data
Bit
Symbol
Reset
Access
Bit
Symbol
Reset
Access
Bit
Symbol
Reset
Access
Scratch Information Register: bit allocation
reserved
R/W
R/W
15
W
7
0
0
7
0
12.3.3 Write/Read Scratch Register
12.3.4 Read Frame Number
Table 39:
This command accesses the 16-bit Scratch Register, which can be used by the
firmware to save and restore information, for example, the device status before
powering down in ‘suspend’ state. The register bit allocation is given in
Code (Hex): B2/B3 — write/read Scratch Register
Transaction — write/read 2 bytes
Table 41:
This command returns the frame number of the last successfully received SOF. It is
followed by reading one or two bytes from the Frame Number Register, containing the
frame number (lower byte first). The Frame Number Register is shown in
Remark: After a bus reset, the value of the Frame Number Register is undefined.
Bit
15 to 0
Bit
15
14 to 8
7 to 0
R/W
R/W
14
W
6
0
0
6
0
Scratch Information Register: bit description
Lock Register: bit description
Symbol
UNLOCK[15:0]
Symbol
-
SFIRH[6:0]
SFIRL[7:0]
R/W
R/W
13
W
5
1
0
5
0
Rev. 05 — 08 December 2004
UNLOCKL[7:0] = 37H
Description
reserved; must be logic 0
Scratch Information Register (high byte)
Scratch Information Register (low byte)
R/W
R/W
Description
Sending data AA37H unlocks the internal registers and FIFOs
for writing, following a ‘resume’.
12
W
4
1
0
4
0
SFIRL[7:0]
SFIRH[6:0]
R/W
R/W
11
W
3
0
0
3
0
Full-speed USB peripheral controller
R/W
R/W
10
W
2
1
0
2
0
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
ISP1181A
R/W
R/W
W
1
1
9
0
1
0
Table
Table
R/W
R/W
40.
W
0
1
8
0
0
0
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42.