TMS320VC5441 Datasheet, PDF (61/86 Pages) Texas Instruments – TMS320VC5441 Fixed-Point Digital Signal Processor

Functional Overview
Table 3–27. Bit Functions for IMR and IFR Registers for Each DSP Subsystem (Continued)
BIT
BIT
BIT
NO.
NAME
VALUE
FUNCTION
3
TINT
0
IFR/IMR: Timer has no interrupt pending/is disabled (masked).
1
IFR/IMR: Timer has an interrupt pending/is enabled.
2
Reserved
X
Register bit is reserved.
1
WDTINT
0
IFR/IMR: Watchdog interrupt has no interrupt pending/is disabled (masked).
1
IFR/IMR: Watchdog interrupt has an interrupt pending/is enabled.
0
INT
0
IFR/IMR: Ext user interrupt pin 0 has no interrupt pending/is disabled (masked).
1
IFR/IMR: Ext user interrupt pin 0 has an interrupt pending/is enabled.
3.7 IDLE3 Power-Down Mode
The IDLE1 and IDLE2 power-down modes operate as described in the TMS320C54x DSP Reference Set,
Volume 1: CPU and Peripherals (literature number SPRU131). The IDLE3 mode is special in that the clocking
circuitry is shut off to conserve power. The 5441 cannot enter an IDLE3 mode unless all the subsystems
execute an IDLE3 instruction. The power-reduced benefits of IDLE3 cannot be realized until all the
subsystems enter the IDLE3 state and the internal clocks are automatically shut off. The order in which
subsystems enter IDLE3 does not matter.
3.8 Emulating the 5441 Device
The 5441 is a single device, but actually consists of four independent subboundary systems that contain
register/status information used by the emulator tools. Code Composer Studio has a setup wizard called
“Code Composer Setup.” The setup wizard prompts the user for the I/O address of the XDSSIO card and the
number of processors in the system. The board.dat file is then created and placed in the correct directory
automatically. The board.dat file contents would look something like this:
“CPU_D” TI320C5xx
“CPU_C” TI320C5xx
“CPU_B” TI320C5xx
“CPU_A” TI320C5xx
The subsystems are serially connected together internally. Emulation information is serially transmitted into
the device using TDI. The device responds with serial scan information transmitted out the TDO pin.
Code Composer Studio is a trademark of Texas Instruments.
52 SPRS122E
December 1999 – Revised April 2002