ST SPC563M64CAL144, Reference Manual

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Calibration software compatibility and configuration RM0345
24/38 Doc ID 024080 Rev 3
9.1.3 Cal Bus EBI Settings
For using the calibration bus with an external memory the user must configure the bus for
multiplexed operation. These settings are located in two registers:
– EBI Module Configuration Register (EBI_MCR)
– EBI Calibration Base Register (EBI_CAL_BRx)
– EBI Calibration Option Register (EBI_CAL_ORx)
The EBI Module Configuration Register contains bits which configure various attributes
associated with EBI operation. In the EBI_MCR register, the D16_31, AD_MUX and DBM
fields need to be configured.
In the EBI_CAL_BRx register there are few fields that need to be configured, these are
detailed in the
Table 14 .
Table 13. EBI_MCR register setting
bit
field
Name Description value
29
D16_31
Data Bus 16_31 Select
The D16_31 bit controls whether the EBI uses the
DATA[0:15] or DATA[16:31] signals, when in 16-bit Data
Bus Mode (DBM=1) or for chip-select accesses to a 16-
bit port (PS=1).
0b0
1 = DATA[16:31] signals are used for 16-bit port accesses
0 = DATA[0:15] signals are used for 16-bit port accesses
30
AD_MUX
Address on Data Bus
Multiplexing Mode
The AD_MUX bit controls whether non-chip-select
accesses have the address driven on (or sampled from
for external master transfers) the data bus in the address
phase of a cycle.
0b1
1 = Address on Data Multiplexing Mode is used for non-
CS accesses.
0 = Only Data on data pins for non-CS accesses.
31
DBM
Data Bus Mode
The DBM bit controls whether the EBI is in 32-bit or 16-bit
Data Bus Mode.
0b1
1 = 16-bit Data Bus Mode is used
0 = 32-bit Data Bus Mode is used