Infineon Technologies TC1796 - 11.8.3 Access to the CMEM

TC1796
System Units (Vol. 1 of 2)
Peripheral Control Processor (PCP)
User’s Manual 11-49 V2.0, 2007-07
PCP, V2.0
Note: Since channel 0 is not defined (no service request with SRPN = 0), the first area
is not an actual CSA. It is recommended that this area should not be used by PCP
channel programs.
The FPI Bus address of a word location pointed to by the Data Pointer R7_DPTR is
calculated by the following formula:
• Effective FPI Bus address[31:0] = (PRAM Base Address) + (<DPTR> << 6)
11.8.3 Access to the CMEM
FPI Bus accesses to the CMEM must always be performed with word accesses; byte or
half-word accesses will result in a bus error.
When using a channel entry table, the FPI Bus address of a specific channel’s entry
location is given by the following formula:
• Effective FPI Bus address[31:0] = (CMEM Base Address) + 04
H
× channel number
The FPI Bus address of an instruction pointed to by the PCP program counter, PC, is
calculated by the following formula:
• Effective FPI Bus address[31:0] = (CMEM Base Address) + <PC> << 1