HD6433935 Hitachi, HD6433935 Datasheet - Page 239

• Manufacturer Part Number: HD6433935
• Description: 8-Bit MICROCONTROLLER
• Manufacturer: Hitachi

6. Timer G operation modes
Timer G operation modes are shown in table 9-13.
Table 9-13 Timer G Operation Modes
Operation Mode
TCG
ICRGF
ICRGR
TMG
Note:
9.5.5
1. Internal clock switching and TCG operation
Depending on the timing, TCG may be incremented by a switch between difference internal clock
sources. Table 9-14 shows the relation between internal clock switchover timing (by write to bits
CKS1 and CKS0) and TCG operation.
When TCG is internally clocked, an increment pulse is generated on detection of the falling edge
of an internal clock signal, which is divided from the system clock (ø) or subclock (øw). For this
reason, in a case like No. 3 in table 9-14 where the switch is from a high clock signal to a low
clock signal, the switchover is seen as a falling edge, causing TCG to increment.
Input capture
Interval
*
Application Notes
To operate the timer G in subactive mode or subsleep mode, select øw/4 as the TCG
When øw/4 is selected as the TCG internal clock in active mode or sleep mode, since
the system clock and internal clock are mutually asynchronous, synchronization is
maintained by a synchronization circuit. This results in a maximum count cycle error of
1/ø(s). When øw/4 is selected as the TCG internal clock in watch mode, TCG and the
noise canceler operate on the øw/4 internal clock without regard to the ø subclock
(øw/8, øw/4, øw/2). Note that when another internal clock is selected, TCG and the
noise canceler do not operate, and input of the input capture input signal does not result
in input capture.
internal clock and øw/2 as the subclock ø
selected, or when øw/8 or øw/4 is selected as the subclock ø
canceler do not operate.
Reset Active
Reset Functions* Functions* Functions/
Reset Functions* Functions* Functions/
Reset Functions* Functions* Functions/
Reset Functions* Functions* Functions/
Reset Functions Held
Sleep
Watch
halted*
halted*
halted*
halted*
Held
SUB
. Note that when other internal clock is
Subactive Subsleep Standby
Functions/
halted*
Functions/
halted*
Functions/
halted*
Functions/
halted*
Functions Held
Functions/
halted*
Functions/
halted*
Functions/
halted*
Functions/
halted*
SUB
, TCG and the noise
Halted
Halted
Held
Held
Held
Module
Standby
Halted
Halted
Held
Held
Held
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