Motorola TMS320C6711D - Manual (Page 54)

TMS320C6711D
FLOATINGĆPOINT DIGITAL SIGNAL PROCESSOR
SPRS292A − OCTOBER 2005 − REVISED NOVEMBER 2005
54 POST OFFICE BOX 1443
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HOUSTON, TEXAS 77251−1443
power-down mode logic
Figure 11 shows the power-down mode logic on the device.
PWRD
Internal Clock Tree
CPU
IFR
IER
CSR
PD1
PD2
Power-
Down
Logic
Clock
PLL
CLKIN RESET
PD3
Internal
Peripherals
Clock
and Dividers
Distribution
† External input clocks, with the exception of CLKOUT3 and CLKIN, are not gated by the power-down mode logic.
TMS320C6711D
CLKOUT2
Figure 11. Power-Down Mode Logic †
triggering, wake-up, and effects
The power-down modes and their wake-up methods are programmed by setting the PWRD field (bits 15−10)
of the control status register (CSR). The PWRD field of the CSR is shown in Figure 12 and described in Table 33.
When writing to the CSR, all bits of the PWRD field should be set at the same time. Logic 0 should be used when
“writing” to the reserved bit (bit 15) of the PWRD field. The CSR is discussed in detail in the TMS320C6000 CPU
and Instruction Set Reference Guide (literature number SPRU189).