ISPPAC-POWR60401TE LATTICE [Lattice Semiconductor], ISPPAC-POWR60401TE Datasheet - Page 15

• Manufacturer Part Number: ISPPAC-POWR60401TE
• Description: In-System Programmable Power Supply Sequencing Controller and Monitor
• Manufacturer: LATTICE [Lattice Semiconductor]

Lattice Semiconductor
The timers can cover a range from 32us to 524ms for the internal oscillator. Longer delays can be achieved by
using the external clock as an input.
Table 2-3. Timer Values
For design entry, the user can select the source for the clock and the PAC-Designer software will calculate the
appropriate delays in an easy-to-select menu format.
The control inputs for Timer1 and Timer2 can be driven by any of the eight PLD macrocell outputs. The reset for the
timers is a function of the Global Reset pin (RESET), a power-on reset or when the timer input goes low. The wave-
forms in Figure 2-6 show the basic timer start and reset functions. Timer and clock divider values are specified in
during the design phase using the PAC-Designer software, while simple pull-down menus allow the user to select
the clocking mode and the values for the timers and the PLD clock.
Figure 2-6. Timer Waveforms
Note that if the clock module is configured as “slave” (i.e. the CLK is an input), the actual time-out of the two timers
is determined by the external clock frequency.
1. Timer values based on 250kHz clock.
0.032 ms
0.064 ms
0.128 ms
0.256 ms
0.512 ms
1.024 ms
2.048 ms
4.096 ms
62 kHz
÷ ÷ ÷ ÷ 4
Timer Gate
Timer Output
(From PLD)
(To PLD)
0.064 ms
0.128 ms
0.256 ms
0.512 ms
1.024 ms
4.096 ms
8.192 ms
31.2 kHz
2.048ms
÷ ÷ ÷ ÷ 8
1
Timer
Start
16.384 ms
0.128 ms
0.256 ms
0.512 ms
1.024 ms
4.096 ms
8.192 ms
15.6 kHz
2.048ms
÷ ÷ ÷ ÷ 16
ProgrammableTimer
Timer Period
Delay
16.384 ms
32.768 ms
0.256 ms
0.512 ms
1.024 ms
4.096 ms
8.192 ms
2.048ms
7.8 kHz
÷ ÷ ÷ ÷ 32
Expired
Timer
2-15
16.384 ms
32.768 ms
65.536 ms
0.512 ms
1.024 ms
4.096 ms
8.192 ms
2.048ms
Reset
Timer
3.9 kHz
÷ ÷ ÷ ÷ 64
Timer
Start
131.072 ms
16.384 ms
32.768 ms
65.536 ms
1.024 ms
4.096 ms
8.192 ms
2.048ms
ispPAC-POWR604 Data Sheet
2 kHz
÷ ÷ ÷ ÷ 128
ProgrammableTimer
Timer Period
Delay
131.072 ms
262.144 ms
16.384 ms
32.768 ms
65.536 ms
4.096 ms
8.192 ms
2.048ms
1 kHz
÷ ÷ ÷ ÷ 256
Expired
Timer
131.072 ms
262.144 ms
524.288 ms
16.384 ms
32.768 ms
65.536 ms
4.096 ms
8.192 ms
0.5 kHz
÷ ÷ ÷ ÷ 512