Specifications

Hardware description
If you only want to write part of a word of data, you can mask the address using one of the
RC200PL1RAM*SetWriteAddressMask() macros.
5.7.1 RAM management tasks
extern macro proc RC200PL1RAM0Run (ClockRate);
extern macro proc RC200PL1RAM1Run (ClockRate);
Parameters:
ClockRate: Clock rate of the clock domain of the call to this macro, in Hz.
Timing:
Does not terminate in normal use.
Description:
Runs the device management tasks for RAM. You must run this macro in parallel
with accesses to the RAM banks.
5.7.2 Setting the RAM address
extern macro proc RC200PL1RAM0SetReadAddress (Address);
extern macro proc RC200PL1RAM1SetReadAddress (Address);
extern macro proc RC200PL1RAM0SetWriteAddress (Address);
extern macro proc RC200PL1RAM1SetWriteAddress (Address);
Parameters: Address: Address of data to read/write on the next clock cycle, of type unsigned
19
on the Standard and Professional versions of the RC200, and unsigned 20 on
Expert boards.
Timing:
1 clock cycle.
Description:
Sets the address of data for the Read or Write which will occur on the next cycle.
Example:
seq
{
RC200PL1RAM0SetReadAddress (Addr);
RC200PL1RAM0Read (&Data);
}
5.7.3 Write address mask
extern macro proc RC200PL1RAM0SetWriteAddressMask (Address, Mask);
extern macro proc RC200PL1RAM1SetWriteAddressMask (Address, Mask);
Parameters: Address: Address of data to read/write on the next clock cycle, of type
unsigned 19 on the Standard and Professional RC200, and unsigned 20 on
Expert boards.
Mask: data value of type unsigned 4.
Timing:
1 clock cycle.
Description: Sets the address for the next write and masks the bytes that are set to 0 in
Mask.
For example, if
Mask was 0010, only the second byte would be written to.
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