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Page 80
8. 16-Bit TimerCounter 1 (TC1)
8.3 Function
T
5CL8
8.3 Function
TimerCounter 1 has six types of operating modes: timer, external trigger timer, event counter, window, pulse width
measurement, programmable pulse generator output modes.
8.3.1 Timer mode
In the timer mode, the up-counter counts up using the internal clock. When a match between the up-counter and the timer
register 1A (TC1DRA) value is detected, an INTTC1 interrupt is generated and the up-counter is cleared. After being
cleared, the up-counter restarts counting. Setting TC1CR<ACAP1> to “1” captures the up-counter value into the timer reg-
ister 1B (TC1DRB) with the auto-capture function. Use the auto-capture function in the operative condition of TC1. A cap-
tured value may not be fixed if it's read after the execution of the timer stop or auto-capture disable. Read the capture value
in a capture enabled condition. Since the up-counter value is captured into TC1DRB by the source clock of up-counter after
setting TC1CR<ACAP1> to "1". Therefore, to read the captured value, wait at least one cycle of the internal source clock
before reading TC1DRB for the first time.
Note: Since the up-counter value is captured into TC1DRB by the source clock of up-counter after setting TC1CR<ACAP1> to "1".
Therefore, to read the captured value, wait at least one cycle of the internal source clock before reading TC1DRB for the first
time.
Table 8-1 Internal Source Clock for TimerCounter 1 (Example: fc
=
16 MHz, fs
=
32.768 kHz)
TC1CK
NORMAL1/2, IDLE1/2 mode
SLOW, SLEEP mode
DV7CK = 0
DV7CK = 1
Resolution
[
µ
s]
Maximum Time Setting
[s]
Resolution
[
µ
s]
Maximum Time Setting
[s]
Resolution
[
µ
s]
Maximum
Time Set-
ting [s]
00
128
8.39
244.14
16.0
244.14
16.0
01
8.0
0.524
8.0
0.524
–
–
10
0.5
32.77 m
0.5
32.77 m
–
–
Example 1 :Setting the timer mode with source clock fc/2
11
[Hz] and generating an interrupt 1 second later
(fc
=
16 MHz, TBTCR<DV7CK>
=
“0”)
LDW
(TC1DRA), 1E84H
; Sets the timer register (1 s
÷
2
11
/fc
=
1E84H)
DI
; IMF
=
“0”
SET
(EIRL). 5
; Enables INTTC1
EI
; IMF
=
“1”
LD
(TC1CR), 00000000B
; Selects the source clock and mode
LD
(TC1CR), 00010000B
; Starts TC1
Example 2 :Auto-capture
LD
(TC1CR), 01010000B
; ACAP1
←
1
:
:
LD
WA, (TC1DRB)
; Reads the capture value
Содержание CEM2100/00
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Страница 17: ...PCB LAYOUT TUNER BOARD TOP SIDE VIEW 17 ...
Страница 18: ...PCB LAYOUT TUNER BOARD BOTTOM SIDE VIEW 18 ...
Страница 19: ...PCB LAYOUT SD BOARD TOP SIDE VIEW ...
Страница 20: ...20 PCB LAYOUT CD CONNECTOR TOP SIDE VIEW ...
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Страница 126: ...Page 4 1 3 Block Diagram T5CL8 1 3 Block Diagram Figure 1 2 Block Diagram ...
Страница 130: ...Page 8 1 4 Pin Names and Functions T5CL8 ...
Страница 155: ...Page 33 T5CL8 ...
Страница 156: ...Page 34 2 Operational Description 2 3 Reset Circuit T5CL8 ...
Страница 186: ...Page 64 5 I O Ports 5 8 Port P7 P77 to P70 T5CL8 ...
Страница 194: ...Page 72 6 Watchdog Timer WDT 6 3 Address Trap T5CL8 ...
Страница 214: ...Page 92 8 16 Bit TimerCounter 1 TC1 8 3 Function T5CL8 ...
Страница 270: ...Page 148 12 Asynchronous Serial interface UART1 12 9 Status Flag T5CL8 ...
Страница 280: ...Page 158 13 Asynchronous Serial interface UART2 13 9 Status Flag T5CL8 ...
Страница 332: ...Page 210 16 Serial Bus Interface I2C Bus Ver D SBI 16 6 Data Transfer of I2C Bus T5CL8 ...
Страница 342: ...Page 220 17 10 bit AD Converter ADC 17 6 Precautions about AD Converter T5CL8 ...
Страница 354: ...Page 232 19 Flash Memory 19 4 Access to the Flash Memory Area T5CL8 ...
Страница 388: ...Page 266 21 Input Output Circuit 21 2 Input Output Ports T5CL8 ...
Страница 397: ...Page 275 T5CL8 23 Package Dimensions LQFP64 P 1010 0 50D Rev 01 Unit mm ...
Страница 398: ...Page 276 23 Package Dimensions T5CL8 ...
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