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TMP89FM42
RA002
14.4 Functions
Timer counters TC00 and TC01 have 8-bit modes in which they are used independently and 16-bit modes in which
they are cascaded.
The 8-bit modes include four operation modes; the 8-bit timer mode, the 8-bit event counter mode, the 8-bit pulse
width modulation output (PWM) mode and the 8-bit programmable pulse generated output (PPG) mode.
The 16-bit modes include four operation modes; the 16-bit timer mode, the 16-bit event counter mode, the 12-bit
PWM mode and the 16-bit PPG mode.
14.4.1 8-bit timer mode
In the 8-bit timer mode, the up-counter counts up using the internal clock, and interrupts can be generated
regularly at specified times. The operation of TC00 is described below, and the same applies to the operation of
TC01. (Replace TC00- by TC01-).
14.4.1.1 Setting
TC00 is put into the 8-bit timer mode by setting T00MOD<TCM0> to "00" or "01", T001CR<TCAS>
to "0" and T00MOD<EIN0> to "0". Select the source clock at T00MOD<TCK0>. 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.
14.4.1.2 Operation
Setting T001CR<T00RUN> to "1" allows the 8-bit up counter to increment based on the selected inter-
nal source clock. 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".
14.4.1.3 Double buffer
The double buffer can be used for T00REG by setting T00MOD<DBE0>. The double buffer is disabled
by setting T00MOD<DBE0> to "0" or enabled by setting T00MOD<DBE0> to "1".
• When the double buffer is enabled
When a write instruction is executed on T00REG during the timer operation, the set value is
initially stored in the double buffer, and T00REG is not immediately updated. T00REG com-
pares the previous set value with the up counter value. When the values match, an INTT00
interrupt request is generated and the double buffer set value is stored in T00REG. Subse-
quently, the match detection is executed using a new set value.
When a write instruction is executed on T00REG while the timer is stopped, the set value is
immediately stored in both the double buffer and T00REG.
• When the double buffer is disabled
When a write instruction is executed on T00REG during the timer operation, the set value is
immediately stored in T00REG. Subsequently, the match detection is executed using a new set
value.
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: ......