TMP47C990E TOSHIBA [Toshiba Semiconductor], TMP47C990E Datasheet - Page 23

• Manufacturer Part Number: TMP47C990E
• Description: CMOS 4-bit Microcontroller
• Manufacturer: TOSHIBA [Toshiba Semiconductor]

TOSHIBA CORPORATION
3.2 Interval Timer
The interval timer can be used to generate an interrupt with a
fixed frequency. For an interval timer interrupt (ITMR), one of 4
frequencies can be selected by command. The command reg-
ister (OP19) is initialized to “0” during reset. An interval timer
interrupt is generated at the first rising edge of the binary
counters output after the command has been set. The interval
timer is not cleared by command, so that the first interrupt
Figure 3-4. Port R8 and HOLD (INT1) Pin
Figure 3-5. Command Register
may occur earlier than the preset interrupt period.
Example: To set the interval timer interrupt frequency to
LD
OUT
fc/2
A,
A,
12
[Hz].
#0110B
%OP19
TMP47C101/201
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