NXP Semiconductors LPC24XX UM10237 - Manual (Page 503)

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User manual Rev. 04 — 26 August 2009 503 of 792
NXP Semiconductors
UM10237
Chapter 18: LPC24XX CAN controllers CAN1/2
15.5 Extended Frame Start Address Register (EFF_sa - 0xE003 C00C)
[1] Write access to the look-up table section configuration registers are possible only during the Acceptance
filter bypass mode or the Acceptance filter off mode.
15.6 Extended Frame Group Start Address Register (EFF_GRP_sa -
0xE003 C010)
[1] Write access to the look-up table section configuration registers are possible only during the Acceptance
filter bypass mode or the Acceptance filter off mode.
Table 446. Extended Frame Start Address Register (EFF_sa - address 0xE003 C00C) bit
description
Bit Symbol Description Reset
Value
1:0 - Reserved, user software should not write ones to reserved bits. The
value read from a reserved bit is not defined. NA
10:2 EFF_sa [1] The start address of the table of individual Extended Identifiers in AF
Lookup RAM. If the table is empty, write the same value in this register
and the EFF_GRP_sa register described below. The largest value that
should be written to this register is 0x800, when both Extended Tables
are empty and the last word (address 0x7FC) in AF Lookup Table RAM
is used. For compatibility with possible future devices, please write
zeroes in bits 31:11 and 1:0 of this register. 0
31:11 - Reserved, user software should not write ones to reserved bits. The
value read from a reserved bit is not defined. NA
Table 447. Extended Frame Group Start Address Register (EFF_GRP_sa - address
0xE003 C010) bit description
Bit Symbol Description Reset
Value
1:0 - Reserved, user software should not write ones to reserved bits.
The value read from a reserved bit is not defined. NA
11:2 Eff_GRP_sa [1] The start address of the table of grouped Extended Identifiers in
AF Lookup RAM. If the table is empty, write the same value in this
register and the ENDofTable register described below. The largest
value that should be written to this register is 0x800, when this
table is empty and the last word (address 0x7FC) in AF Lookup
Table RAM is used. For compatibility with possible future devices,
please write zeroes in bits 31:12 and 1:0 of this register. 0
31:12 - Reserved, user software should not write ones to reserved bits.
The value read from a reserved bit is not defined. NA