Renesas M16C FAMILY Hardware Manual page 82

16-bit single-chip microcomputer
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Under development
Preliminary specification
Specifications in this manual are tentative and subject to change.
R8C/11 Group
Prescaler X Register
b7
Timer X Register
b7
Timer count source setting register
b7 b6 b5 b4 b3 b2 b1 b0
0
0
Notes:
1. Avoid switching a count source, while a counter is in progress. Timer counter must be stopped before switching a count
source.
Figure 12.3 PREX Register, TX Register, and TCSS Register
Rev.0.91
2003 Sep 08
b0
Mode
Timer mode
Pulse output mode
Event counter mode
Pulse width
measurement mode
Pulse period
measurement mode
b0
Underflow of Prescaler X is counted
Symbol
TCSS
Bit symbol
Timer X count source
TXCK0
select bit
TXCK1
TYCK0
Timer Y count source
select bit
TYCK1
Timer Z count source
TZCK0
select bit
TZCK1
Reserved bit
(b7-b6)
page 72 of 184
Symbol
Address
PREX
008C
Function
Internal count source is counted
Internal count source is counted
Externally input pulses are counted
Pulse width of externally input
pulses is measured
(Internal count source is counted)
Pulse period of externally input
pulses is measured
(Internal count source is counted)
Symbol
Address
TX
008D
Function
Address
After reset
008E
00
16
16
Bit name
b1 b0
0 0 : f
1
1
0 1 : f
8
1 0 : f
32
1 1 : f
2
b3 b2
0 0 : f
1
1
0 1 : f
8
1 0 : f
RING
1 1 : Selects input from CNTR
b5 b4
0 0 : f
1
1
0 1 : f
8
1 0 : Selects Timer Y underflow
1 1 : f
2
Must be set to "0"
12.1 Timer (Timer X)
After reset
FF
16
16
Setting range
00
to FF
16
16
00
to FF
16
16
00
to FF
16
16
00
to FF
16
16
00
to FF
16
16
After reset
FF
16
16
Setting range
00
to FF
16
16
Function
pin
1
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW
RW

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