TMS320LF2407A Datasheet, PDF (66/134 Pages) Texas Instruments – DSP CONTROLLERS

TMS320LF2407A, TMS320LF2406A, TMS320LF2403A, TMS320LF2402A
TMS320LC2406A, TMS320LC2404A, TMS320LC2403A, TMS320LC2402A
DSP CONTROLLERS
SPRS145K − JULY 2000 − REVISED AUGUST 2005
watchdog (WD) timer module (continued)
WDCLK
System
Reset
6-Bit
Free-
/64
Running /32
Counter _/16
/8
/4
CLR
/2
÷ 512
CLKOUT
3-bit
Prescaler
PLL
CLKIN
On-Chip
Oscillator or
External
Clock
WDPS
WDCR.2 −0
210
WDCR.6
WDDIS
000
001
010
011
100
101
110
111
WDCNTR.7 −0
8-Bit Watchdog
Counter
CLR
One-Cycle
Delay ^PS/257
WDFLAG
WDCR.7
Reset Flag
Internal
Pullup
RS Pin
WDKEY.7 −0
Watchdog
Reset Key
Register
Bad Key
55 + AA
Detector
Good Key
WDCHK2−0
WDCR.5 −3^†
3
Bad WDCR Key
System Reset
3
101
(Constant
Value)
† _{Writing to bits WDCR.5 −3 with anything but the correct pattern (101) generates a system reset.}
Figure 19. Block Diagram of the WD Module
System
Reset
Request
66
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