MB91133 Datasheet, PDF (49/123 Pages) Fujitsu Component Limited. – 32-Bit RISC Microcontroller

MB91133/MB91F133
3. 8/16-bit Up/Down Counter / Timer
8/16-bit up/down counter / timer is configured of event input pins × 6, 8-bit up/down counters × 2, 8-bit reload /
compare registers × 2 and their control circuits.
• Characteristics of 8/16-bit Up/Down Counter / Timer
• Counting from (0) d to (256) d is possible using an 8-bit counting register.
(Counting from (0) d to (65535) d is possible in 16-bit × 1 operation mode.)
• 4 types of counting mode can be selected by the count clock
• Selection can be made from two types of internal clock as the count clock in timer mode.
• Detection edge of the external pin input signals can be selected in up/down count mode.
• Phase difference count mode is suited to count encoders such as motors. Turning angle and turning number,
etc., can easily and accurately be counted by separately inputting phase A, B and Z outputs of the encoder.
• Selection can be made from two function types for the ZIN pin (valid for all modes) .
• Compare and reload functions are featured, and each function can be used alone or in combination.
Up/down counting with random width can be carried out using both functions in combination.
• The count direction directly before can be identified by the count direction flag.
• Generation of interruptions in case of compared match, reload (underflow) or overflow and in cases where the
count direction is changed can be controlled separately.
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