參數(shù)資料
型號(hào)： UPD78F9512GR-JJG-A
廠商： Renesas Electronics America
文件頁數(shù)： 172/175頁
文件大?。?/td> 0K
描述： MCU 8BIT SGL CHIP 16PIN
標(biāo)準(zhǔn)包裝： 400
系列： 78K0S/Kx1+
核心處理器： 78K0S
芯體尺寸： 8-位
速度： 10MHz
外圍設(shè)備： LVD，POR，PWM，WDT
輸入/輸出數(shù)： 13
程序存儲(chǔ)器容量： 4KB（4K x 8）
程序存儲(chǔ)器類型： 閃存
RAM 容量： 128 x 8
電壓 - 電源 (Vcc/Vdd)： 2 V ~ 5.5 V
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 16-SSOP（0.173"，4.40mm 寬）
包裝： 托盤
CHAPTER 6 16-BIT TIMER/EVENT COUNTER 00
User’s Manual U16994EJ6V0UD
94
(3) 16-bit timer capture/compare register 010 (CR010)
CR010 is a 16-bit register which has the functions of both a capture register and a compare register. Whether
it is used as a capture register or a compare register is set by bit 2 (CRC002) of capture/compare control
register 00 (CRC00).
CR010 is set by 16-bit memory manipulation instruction.
Reset signal generation clears CR010 to 0000H.
Figure 6-4. Format of 16-bit Timer Capture/Compare Register 010 (CR010)
CR010
Symbol
FF17H
FF16H
Address: FF16H, FF17H
After reset: 0000H
R/W
76543210
When CR010 is used as a compare register
The value set in CR010 is constantly compared with the 16-bit timer counter 00 (TM00) count value, and an
interrupt request (INTTM010) is generated if they match.
When CR010 is used as a capture register
It is possible to select the valid edge of the TI000 pin as the capture trigger. The TI000 valid edge is set by
means of prescaler mode register 00 (PRM00) (refer to Table 6-3).
Table 6-3. CR010 Capture Trigger and Valid Edge of TI000 Pin (CRC002 = 1)
CR010 Capture Trigger
TI000 Pin Valid Edge
ES010
ES000
Falling edge
0
Rising edge
0
1
Both rising and falling edges
1
Remarks 1. Setting ES010, ES000 = 1, 0 is prohibited.
2. ES010, ES000: Bits 5 and 4 of prescaler mode register 00 (PRM00)
CRC002:
Bit 2 of capture/compare control register 00 (CRC00)
Cautions 1. In the free-running mode and in the clear & start mode using the valid edge of the TI000
pin, if CR010 is set to 0000H, an interrupt request (INTTM010) is generated when CR010
changes from 0000H to 0001H after an overflow (FFFFH).
2. If the new value of CR010 is less than the value of 16-bit timer counter 00 (TM00), TM00
continues counting, overflows, and then starts counting from 0 again. If the new value of
CR010 is less than the old value, therefore, the timer must be reset to be restarted after
the value of CR010 is changed.
3. The value of CR010 after 16-bit timer/event counter 00 has stopped is not guaranteed.
4. The capture operation may not be performed for CR010 set in compare mode even if a
capture trigger is input.
5. If the register read period and the input of the capture trigger conflict when CR010 is
used as a capture register, the capture trigger input takes precedence and the read data
is undefined. Also, if the timer count stop and the input of the capture trigger conflict,
the capture data is undefined.
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