Download UM10375

D
D
R
R
R
R
R
D
D
D
D
R
R
D
R
R
A
FT
FT
FT
A
A
R
R
D
D
D
R
A
FT
FT
A
A
R
R
D
D
Reset
value
F
FT
FT
A
A
R
R
D
D
D
BULKOUT
Description
FT
FT
FT
FT
1
Value
A
A
A
A
R
R
D
D
D
Table 138. USB Device FIQ Select register (USBDevFIQSel - address 0x4002 002C) bit
description
Symbol
FT
FT
FT
FT
FT
UM10375
Chapter 9: LPC13xx USB device controller
Bit
A
A
A
A
A
NXP Semiconductors
D
R
A
-
D
Interrupt routing for bulk in endpoints [1]
FT
BULKOUT interrupt will be routed to the high-priority
interrupt line FIQ.
A
1
R
[1]
BULKOUT interrupt will be routed to the low-priority
interrupt line IRQ.
BULKIN
31:3
0
0
D
2
Interrupt routing for bulk out endpoints [1]
0
0
BULKIN interrupt will be routed to the low-priority
interrupt line IRQ.
1
BULKIN interrupt will be routed to the high-priority
interrupt line FIQ.
-
Reserved
-
Remark: For logical endpoint 3 (physical endpoints 6 and 7) only.
10. Serial interface engine command description
The functions and registers of the Serial Interface Engine (SIE) are accessed using
commands, which consist of a command code followed by optional data bytes (read or
write action). The USBCmdCode (Table 9–131) and USBCmdData (Table 9–132)
registers are used for these accesses.
A complete access consists of two phases:
1. Command phase: the USBCmdCode register is written with the CMD_PHASE field
set to the value 0x05 (Command), and the CMD_CODE field set to the desired
command code. On completion of the command, the CCEMPTY bit of USBDevIntSt is
set.
2. Data phase (optional): for writes, the USBCmdCode register is written with the
CMD_PHASE field set to the value 0x01 (Write), and the CMD_WDATA field set with
the desired write data. On completion of the write, the CCEMPTY bit of USBDevIntSt
is set. For reads, USBCmdCode register is written with the CMD_PHASE field set to
the value 0x02 (Read), and the CMD_CODE field set with command code the read
corresponds to. On completion of the read, the CDFULL bit of USBDevInSt will be set,
indicating the data is available for reading in the USBCmdData register. In the case of
multi-byte registers, the least significant byte is accessed first.
An overview of the available commands is given in Table 9–139.
Here is an example of the Read Current Frame Number command (reading 2 bytes):
USBDevIntClr = 0x30;
USBCmdCode = 0x00F50500;
while (!(USBDevIntSt & 0x10));
USBDevIntClr = 0x10;
USBCmdCode = 0x00F50200;
while (!(USBDevIntSt & 0x20));
USBDevIntClr = 0x20;
CurFrameNum = USBCmdData;
//
//
//
//
//
//
//
//
Clear both CCEMPTY & CDFULL
CMD_CODE=0xF5, CMD_PHASE=0x05(Command)
Wait for CCEMPTY.
Clear CCEMPTY interrupt bit.
CMD_CODE=0xF5, CMD_PHASE=0x02(Read)
Wait for CDFULL.
Clear CDFULL.
Read Frame number LSB byte.
UM10375_0
User manual
© NXP B.V. 2009. All rights reserved.
Rev. 00.10 — 19 October 2009
115 of 290