UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 388

• Manufacturer Part Number: UPD784026
• Description: 16/8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

11.4 TIMER REGISTER 3 (TM3) OPERATION
11.4.1 Basic Operation
register 0 (TMC0)*.
mode register 0 (PRM0).
of TMC0 control timer 3 operation). When the CE3 bit is set (1) by software, the contents of TM3 are immediately cleared
on the first count clock, and then the up-count operation is performed. When the CE3 bit is cleared (0), TM3 becomes 0H
immediately, and match signal generation is stopped. If the CE3 bit is set (1) again when it is already set (1), TM3 continues
the count operation without being cleared.
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Timer 3 can operate in an 8-bit or 16-bit mode. These operation modes are selected by bit 4 (BW3) of timer control
In the timer 3 count operation, an up-count is performed using the count clock specified by the high-order 4 bits of prescaler
When RESET is input, TM3 is cleared to 0000H, and the count operation is stopped.
Count operation enabling/disabling is controlled by bit 7 (CE3) of timer control register 0 (TMC0) (the high-order 4 bits
* Unless there functional differences are found, the register names in the 8-bit mode are used.
In the 16-bit mode, the register names TM3 and CR30 are TM3W and CR30W, respectively.
CHAPTER 11 TIMER 3