HD6432646 Hitachi, HD6432646 Datasheet - Page 393

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HD6432646

Manufacturer Part Number
HD6432646
Description
(HD64F264x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet

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Examples of Phase Counting Mode Operation: In phase counting mode, TCNT counts up or
down according to the phase difference between two external clocks. There are four modes,
according to the count conditions.
Table 10-9 Up/Down-Count Conditions in Phase Counting Mode 1
TCLKA (Channels 1 and 5)
TCLKC (Channels 2 and 4)
High level
Low level
High level
Low level
Legend
TCLKA (channels 1 and 5)
TCLKC (channels 2 and 4)
TCLKB (channels 1 and 5)
TCLKD (channels 2 and 4)
Phase counting mode 1
Figure 10-29 shows an example of phase counting mode 1 operation, and table 10-9
summarizes the TCNT up/down-count conditions.
: Rising edge
: Falling edge
TCNT value
Figure 10-29 Example of Phase Counting Mode 1 Operation
Up-count
TCLKB (Channels 1 and 5)
TCLKD (Channels 2 and 4)
Low level
High level
High level
Low level
Down-count
Operation
Up-count
Down-count
Time
359

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