r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 742
r4f2426
Manufacturer Part Number
r4f2426
Description
16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R4F2426.pdf
(1302 pages)
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Section 11 16-Bit Timer Pulse Unit (TPU)
11.3.5
TSR registers indicate the status of each channel. The TPU has six TSR registers, one for each
channel.
Rev. 1.00 Sep. 19, 2008 Page 714 of 1270
REJ09B0466-0100
Bit
7
6
5
4
Bit Name
TCFD
—
TCFU
TCFV
Timer Status Register (TSR)
1
1
0
0
Initial value
R/W
R
—
R/(W)*
R/(W)*
Description
Count Direction Flag
Status flag that shows the direction in which TCNT
counts in channels 1, 2, 4, and 5.
In channels 0 and 3, bit 7 is reserved. It is always
read as 1 and cannot be modified.
0: TCNT counts down
1: TCNT counts up
Reserved
This bit is always read as 1 and cannot be
modified.
Underflow Flag
Status flag that indicates that TCNT underflow has
occurred when channels 1, 2, 4, and 5 are set to
phase counting mode.
In channels 0 and 3, bit 5 is reserved. It is always
read as 0 and cannot be modified.
[Setting condition]
When the TCNT value underflows (changes from
H'0000 to H'FFFF)
[Clearing condition]
When 0 is written to TCFU after reading TCFU = 1
Overflow Flag
Status flag that indicates that TCNT overflow has
occurred.
[Setting condition]
When the TCNT value overflows (changes from
H'FFFF to H'0000)
[Clearing condition]
When 0 is written to TCFV after reading TCFV = 1
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