Texas Instruments TMS320C3x User Manual page 71

CPU Multiport Register File
Table 3–2. Status Register Bits (Continued)
Bit Name Reset Value
PRGW Dependent
on PRGW
pin level
Note: If a load of the status register occurs simultaneously with a CPU interrupt pulse trying to reset GIE, GIE is reset.
3-8
Name
Program width status
('C32 only)
Description
Indicates the status of the external input PRGW pin.
When the signal of the PRGW pin is high, the PRGW
status bit is set to 1, indicating a 16-bit memory width.
The 'C32 performs two fetches to retrieve a single 32-bit
instruction word. The PRGW bit is a read-only bit, and
can have the following values:
PRG Effect
0 Instruction fetches use one 32-bit exter-
nal program memory read.
1 Instruction fetches use two 16-bit exter-
nal program memory reads.