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Processor Signal Descriptions
ARM DDI 0363E Copyright © 2009 ARM Limited. All rights reserved. A-13
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A.6 TCM interface signals
Table A-8 shows the ATCM port signals.
Table A-9 shows the B0TCM port signals.
Table A-8 ATCM port signals
Name Direction Clocking Description
ATCDATAIN [63:0] Input CLKIN Data from ATCM
ATCPARITYIN [13:0] Input CLKIN Parity or ECC code from ATCM
ATCERROR Input CLKIN
Error detected by ATCM
a
ATCWAIT Input CLKIN Wait from ATCM
ATCLATEERROR Input CLKIN
Late error from ATCM
a
ATCRETRY Input CLKIN
Access to ATCM must be retried
a
ATCADDRPTY Output CLKIN
Parity formed from ATCM address output
b
ATCEN0 Output CLKIN Enable for ATCM lower word, bit range [31:0]
ATCEN1 Output CLKIN Enable for ATCM upper word, bit range [64:32]
ATCWE Output CLKIN Write enable for ATCM
ATCADDR [22:3] Output CLKIN Address for ATCM data RAM
ATCBYTEWR [7:0] Output CLKIN Byte strobes for direct write
ATCSEQ Output CLKIN ATCM RAM access is sequential
ATCDATAOUT [63:0] Output CLKIN Write data for ATCM data RAM
ATCPARITYOUT [13:0] Output CLKIN Write parity or ECC code for ATCM
ATCACCTYPE[2:0] Output CLKIN Determines access type:
b001 = Load/Store
b010 = Fetch
b100 = DMA
b100 = MBIST
c
.
a. This signal is ignored when bit [0] of the Auxiliary Control Register is set to 0, see c1, Auxiliary Control
Register on page 4-38.
b. Only generated if the processor is configured to include TCM address bus parity.
c. The MBIST interface has no way of signalling a wait. If it is accessing the TCM, and the TCM signals a wait,
the AXI slave pipeline stalls and the data arrives later. However, no signal is sent to the MBIST controller to
indicate this.
Table A-9 B0TCM port signals
Name Direction Clocking Description
B0TCDATAIN [63:0] Input CLKIN Data from B0TCM
B0TCPARITYIN [13:0] Input CLKIN Parity or ECC code from B0TCM
B0TCERROR Input CLKIN
Error detected by B0TCM
a
B0TCWAIT Input CLKIN Wait from B0TCM