UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 282
UPD784026
Manufacturer Part Number
UPD784026
Description
16/8-bit Single-chip Microcontrollers
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.UPD784026.pdf
(759 pages)
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9.4 TIMER REGISTER 1 (TM1) OPERATION
9.4.1 Basic Operation
control register 1 (TMC1).*
prescaler mode register 1 (PRM1).
the low-order 4 bits of the TMC1). When the CE1 bit is set (1) by software, the contents of TM1 are cleared to 0H on the first
count clock, and then the up-count operation is performed.
stopped.
TM1W becomes 0H. In this case, OVF1 bit is set. OVF1 bit is cleared by software only. The count operation is continued.
242
8-bit operating mode/16-bit operating mode control can be performed for timer/counter 1 by means of bit 0 (BW1) of timer
In the timer/counter 1 count operation, an up-count is performed using the count clock specified by the low-order 4 bits of
Count operation enabling/disabling is controlled by bit 3 (CE1) of TMC1 (timer/counter 1 operation control is performed by
When the CE1 bit is cleared (0), TM1 becomes 0H immediately, and capture operations and match signal generation are
If the CE1 bit is set (1) again when it is already set (1), TM1 continues the count operation without being cleared.
If the count clock is input when TM1 is FFH in 8-bit operating mode and when TM1W is FFFFH in 16-bit operating mode, TM1/
When RESET is input, TM1 is cleared to 0H, and the count operation is stopped.
* Unless otherwise specified, the functions of timer register 1 in the 8-bit operating mode are described hereafter. In the
16-bit operating mode, TM1, CR10, CR11, and CR12 operate as TM1W, CR10W, CR11W, and CR12W respectively.
CHAPTER 9 TIMER/COUNTER 1
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