Texas Instruments TMS320C3x - Manual (Page 268)

Overview
9-2
9.1 Overview
The ’C30 provides two external interfaces: the primary bus and the expansion
bus. The TMS320C31 provides one external interface: the primary bus. The
primary bus consists of a 32-bit data bus, a 24-bit address bus, and a set of
control signals. The expansion bus consists of a 32-bit data bus, a 13-bit
address bus, and a set of control signals. Each interface has the following
features:
- Separate configurations controlled by memory-mapped external interface
control registers
- Hold request and acknowledge signal for putting the external memory inter-
face signals in high impedance mode and preventing the processor from
accessing the external bus
- Selectable wait state that can be controlled through software, hardware,
or combination of software and hardware
- Unified memory space for data, program, and I/O access