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14. 8-bit Timer Counter (TC0)
TMP89FM42
RA002
14.4.2 8-bit event counter mode
In the 8-bit event counter mode, the up counter counts up at the falling edge of the input to the TC00 or TC01
pin. The operation of TC00 is described below, and the same applies to the operation of TC01.
14.4.2.1 Setting
TC00 is put into the 8-bit event counter mode by setting T00MOD<TCM0> to "00", T001CR<TCAS>
to "0" and T00MOD<EIN0> to "1". Set the count value to be used for the match detection as an 8-bit
value at the timer register T00REG.
Set T00MOD<DBE0> to "1" to use the double buffer.
Setting T001CR<T00RUN> to "1" starts the operation. After the timer is started, writing to T00MOD
becomes invalid. Be sure to complete the required mode settings before starting the timer.
14.4.2.2 Operation
Setting T001CR<T00RUN> to "1" allows the 8-bit up counter to increment at the falling edge of the
TC00 pin. When a match between the up-counter value and the T00REG set value is detected, an INTT00
interrupt request is generated and the up counter is cleared to "0x00". After being cleared, the up counter
restarts counting. Setting T001CR<T00RUN> to "0" during the timer operation makes the up counter stop
counting and be cleared to "0x00".
The maximum frequency to be supplied is fcgck/2
2
[Hz] (in NORMAL1/2 or IDLE1/2 mode) or fs/24
[Hz] (in SLOW1/2 or SLEEP1 mode), and a pulse width of two machine cycles or more is required at
both the "H" and "L" levels.
14.4.2.3 Double buffer
Refer to "14.4.1.3 Double buffer".
(Example)
Operate TC00 in the 8-bit event counter mode and generate an interrupt each time 16 falling edges are detected at the
TC00 pin.
LD
(POFFCR0),0x10
; Sets TC001EN to "1"
DI
; Sets the interrupt master enable flag to "disable"
SET
(EIRH).4
; Sets the INTTC00 interrupt enable register to "1"
EI
; Sets the interrupt master enable flag to "enable"
LD
(T00MOD),0xC4
; Selects to the 8-bit event counter mode
LD
(T00REG),0x10
; Sets the timer register
SET
(T001CR).0
; Starts TC00
Summary of Contents for TLCS-870/C1 Series
Page 1: ...8 Bit Microcontroller TLCS 870 C1 Series TMP89FM42 查询TMP89FM42供应商 捷多邦 专业PCB打样工厂 24小时加急出货 ...
Page 3: ...Revision History Date Revision 2007 10 25 1 First Release 2007 11 3 2 Contents Revised ...
Page 4: ......
Page 14: ......
Page 18: ...1 3 Block Diagram TMP89FM42 1 3 Block Diagram Figure 1 2 Block Diagram ...
Page 22: ...1 4 Pin Names and Functions TMP89FM42 ...
Page 60: ...2 CPU Core 2 5 Revision History TMP89FM42 ...
Page 76: ...3 Interrupt Control Circuit 3 8 Revision History TMP89FM42 ...
Page 86: ...4 External Interrupt control circuit 4 3 Function TMP89FM42 ...
Page 102: ...7 Voltage Detection Circuit 7 5 Revision History TMP89FM42 ...
Page 126: ...8 I O Ports 8 3 I O Port Registers TMP89FM42 Note 2 i 0 to 1 ...
Page 136: ...8 I O Ports 8 5 Revision History TMP89FM42 ...
Page 142: ...9 Special Function Registers 9 3 SFR3 0x0E40 to 0x0EFF TMP89FM42 ...
Page 146: ...10 Low Power Consumption Function for Peripherals TMP89FM42 ...
Page 149: ...TMP89FM42 11 3 Revision History Rev Description RA001 Deleted SLEEP2 description ...
Page 150: ...11 Divider Output DVO 11 3 Revision History TMP89FM42 ...
Page 220: ...15 Real Time Clock RTC 15 4 Real Time Clock Operation TMP89FM42 ...
Page 250: ...16 Asynchronous Serial Interface UART 16 15 Revision History TMP89FM42 ...
Page 302: ...18 Serial Bus Interface SBI 18 7 Revision History TMP89FM42 ...
Page 338: ...21 Flash Memory 21 4 Toggle Bit D6 TMP89FM42 ...
Page 384: ...22 Serial PROM Mode 22 15 Revision History TMP89FM42 ...
Page 388: ...24 Input Output Circuit 24 1 Control Pins TMP89FM42 ...
Page 404: ...25 Electrical Characteristics 25 11 Revision History TMP89FM42 ...
Page 406: ...26 Package Dimensions TMP89FM42 ...
Page 408: ......