HD64570F Renesas Electronics America, HD64570F Datasheet - Page 320
HD64570F
Manufacturer Part Number
HD64570F
Description
IC SCA SRL COMM ADAPTER 88QFP
Manufacturer
Renesas Electronics America
Datasheet
1.HD64570F.pdf
(469 pages)
Specifications of HD64570F
Applications
ISDN
Interface
Serial
Voltage - Supply
4.5 V ~ 5.5 V
Package / Case
88-QFP
Mounting Type
Surface Mount
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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7.2.2
The timer constant register (TCONR), provided for each of channels 0, 1, 2, and 3, specifies timer
output timing. The TCONR value is constantly compared with the timer up-counter (TCNT)
value. When they match, the CMF bit of timer control status register (TCSR) is set to 1, and an
interrupt is generated, if enabled. Here, TCNT is cleared and resumes incrementing from 0000H.
(For details on timing, see section 7.3.2, Output Timing.) In this way, periodic interrupts can be
generated without software overhead. TCONR is initialized to FFFFH at reset or in system stop
mode.
Rev. 0, 07/98, page 304 of 453
Timer Constant Register (TCONR: TCONRH, TCONRL)
Note: Initial values are the same in system stop mode and after reset.
Read/Write
Initial value
Timer
Read/Write
Initial value
Timer
TCNTH
TCNTL
R/W
R/W
2
2
7
0
7
0
15
7
R/W
R/W
2
2
6
0
6
0
14
6
R/W
R/W
2
2
5
0
5
0
13
5
R/W
R/W
2
2
4
0
4
0
12
4
R/W
R/W
CPU Mode
Mode 0
Mode 1
Mode 2
Mode 3
2
2
3
0
3
0
11
3
R/W
R/W
2
2
2
0
2
0
10
2
R/W
R/W
2
2
1
0
1
0
1
9
C
4
5
6
5
R/W
R/W
2
2
0
0
0
0
8
0
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