tmp88cs43fg TOSHIBA Semiconductor CORPORATION, tmp88cs43fg Datasheet - Page 208

• Manufacturer Part Number: tmp88cs43fg
• Description: 8 Bit Microcontroller Tlcs-870/x Series
• Manufacturer: TOSHIBA Semiconductor CORPORATION

17. 8-Bit High-speed PWM (HPWM0 and HPWM1)
17.3 Functional Description
17.3.1.3 6-bit mode
(when X1 = 20 MHz).
ns resolution. However, because the actually obtained resolution is 25 ns, said resolution is accomplished
artificially. To obtain a 12.5 ns resolution, the first, second, and third pulses are output by adding 25 ns, 0
ns, and 25 ns, respectively. In this way, a 12.5 ns resolution is realized as being “equivalent to.”
the pulse is 3.0 μs (data “F0”: “3B” + “0”).
Note: The resolution of the LSB 1 bit (25 nsec) is a typical value and its precision is not guaranteed.
In 6-bit mode, it is possible to generate a pulse with 3.2 μs period and approximately 313 kHz frequency
In 6-bit mode, the period is comprised of 6 bits (period = 2
The minimum equivalent width of the pulse is 0.2 μs (data “10”), and the maximum equivalent width of
Pulse width = (6 high-order bits of data × 50 ns) + (2 low-order bits of data *)
* The equivalent plus times in 2 low-order bits of data are shown below.
Figure 17-4 Shows a typical waveform in 6-bit mode. (The values are for X1 = 20 MHz.)
"10h"
"F0h"
"11h"
Data
6 high-order bits
×
400 ns
50 ns
425 ns
Figure 17-3 7-Bit Mode
6.000 µs
6 high-order bits
3.2 μs
7
2-bit data
0
0
1
1
6.4 µs
0
1
0
1
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Varies with value of 2
2 low-order bits
Equivalent plus time
low-order bits
6 high-order bits
0
12.5 ns
37.5 ns
×
Data register
25 ns
400 ns
0 ns
50 ns
425 ns
6.000 µs
3.2 μs
6.4 µs
6
× 50 ns) and two other bits provide a 12.5
TMP88CS43FG