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ARM DUI 0224F Copyright © 2003-2007 ARM Limited. All rights reserved. 4-45
The control and data registers for the character LCD interface are listed in Table 4-25.
Table 4-25 Character LCD control and data registers
Address Name Type Description
0x10008000
CHAR_COM Write command, read
busy status
A write to this address will cause a write to the
HD44780 command register some cycles later.A
read from this address will cause a read from the
HD44780 busy register some cycles later.
Note
The data read from this address is not valid LCD
register data. Use the CHAR_RAW and
CHAR_RD registers to return LCD register data.
0x10008004
CHAR_DAT Write data RAM, read
data RAM
A write to this address will cause a write to the
HD44780 data register some cycles later.A read
to this address will cause a read to the HD44780
data register some cycles later.The data read from
this address is not valid LCD register data. Use
the CHAR_RAW and CHAR_RD registers to
return LCD register data.
0x10008008
CHAR_RD Read captured data
from an earlier read
command
Bits [7:0] contain the data from last request read,
valid only when bit 0 is set in CHAR_RAW. Bits
[31:8] should be ignored.
0x1000800C
CHAR_RAW Write to reset access
complete flag, read to
determine if data in
CHAR_RD is valid
Bit 0 indicates AccessComplete (write 0 to clear).
The bit is set if read data is valid. Bits [31:1]
should be ignored.
0x10008010
CHAR_MASK Write interrupt mask Set bit 0 to 1 to enable AccessComplete to
generate an interrupt on SIC 7.
0x10008014
CHAR_STAT Read status Bit 0 is the state of AccessComplete ANDed with
the CHAR_MASK