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12.3
16-bit Reload Timer Pins
This section describes the pins of the 16-bit reload timer and provides a pin block
diagram.
■ 16-bit Reload Timer Pins
The pins of the 16-bit reload timer are shared with the general-purpose ports. Table 12.3-1 lists the
functions of the pins, I/O format, and settings required to use the 16-bit reload timer.
Table 12.3-1 16-bit reload timer pins
Pin name
Port 1 input-output / external
P15/INT5/TIN0
interrupt input /timer input
Port 1 input-output / external
P16/INT6/TO0
interrupt input /timer output
Port 2 input-output / timer
P20/TIN1
input
Port 2 input-output / timer
P21/TO1
output
■ Block Diagram of the 16-bit Reload Timer Pins
Figure 12.3-1 shows the block diagram of the16-bit reload timer pins.
tandby control: Stop, clock mode with SPL = 1
S
*1: Only pins with peripheral functions are used for resource I/O.
Pin function
CMOS output /
CMOS hysteresis
Figure 12.3-1 Block Diagram of the 16-bit Reload Timer Pins
Resource input (*1)
PDR (port data register)
PDR read
Output latch
PDR write
DDR (port direction register)
Direction latch
DDR write
DDR read
Pull-up
I/O format
option
Selection
allowed
input
Resource output (*1)
Resource output enabled (*1)
Standby control (SPL = 1)
CHAPTER 12 16-BIT RELOAD TIMER
Standby
Settings required for pins
control
Setting for the input port
(DDR1: bit15 = 0)
Setting for timer output enable
(TMCSRL0: OUTE = 1)
Available
Setting for the input port
(DDR2: bit0 = 0)
Setting for timer output enable
(TMCSRL1: OUTE = 1)
Pins
235
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