tmp88fw45afg TOSHIBA Semiconductor CORPORATION, tmp88fw45afg Datasheet - Page 237

• Manufacturer Part Number: tmp88fw45afg
• Description: 8 Bit Microcontroller Tlcs-870/x Series
• Manufacturer: TOSHIBA Semiconductor CORPORATION

19.3.1.1
19.3.1.2
(when X1 = 20 MHz).
“F0”).
(when X1 = 20 MHz).
resolution (half period of the source clock (X1)). Therefore, when the one low-order bit = 1, a plus-25 ns
pulse is output.
“F0”: “78” + “0”).
In 8-bit mode, it is possible to generate a pulse with 12.8 μs period and approximately 78 kHz frequency
The minimum width of the pulse is 0.8 μs (data “10”), and the maximum width of the pulse is 12.0 μs (data
Pulse width = 8-bit data × 50 ns
Figure 19-2 shows a typical waveform in 8-bit mode. (The values are for X1 = 20 MHz.)
In 7-bit mode, it is possible to generate a pulse with 6.4 μs period and approximately 156 kHz frequency
In 7-bit mode, the period is comprised of 7 bits (period = 2
The minimum width of the pulse is 0.4 μs (data “10”), and the maximum width of the pulse is 6.0 μs (data
8-bit mode
7-bit mode
"F0h"
"10h"
"11h"
Data
Data register value
Value of 7
high-order bits
×
×
800 ns
50 ns
50 ns
850 ns
Figure 19-2 8-Bit Mode
12.8 µs
12.0 µs
6.4 µs
7
7 hight-order bits 1 low-order bit
7
12.8 µs
8-bit data
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Value of 1
low-order bits ×
Data register value
0
Value of 7
high-order bits
Data register
×
0
×
800 ns
50 ns
50 ns
Data register
850 ns
25 ns
12.8 µs
12.0 µs
6.4 µs
12.8 µs
7
× 50 ns) and one other bit provides a 25 ns
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