參數(shù)資料
型號: MC68HC705C9AVFNE
廠商: Freescale Semiconductor
文件頁數(shù): 69/118頁
文件大?。?/td> 0K
描述: IC MCU 8BIT 352 BYTES RAM 44-PLC
標(biāo)準(zhǔn)包裝: 26
系列: HC05
核心處理器: HC05
芯體尺寸: 8-位
速度: 2.1MHz
連通性: SCI,SPI
外圍設(shè)備: POR,WDT
輸入/輸出數(shù): 24
程序存儲器容量: 16KB(16K x 8)
程序存儲器類型: OTP
RAM 容量: 352 x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 105°C
封裝/外殼: 44-LCC(J 形引線)
包裝: 管件
Capture/Compare Timer
MC68HC05C9A Advance Information Data Sheet, Rev. 4.1
54
Freescale Semiconductor
8.3.2 Timer Status Register
The timer status register (TSR), shown in Figure 8-3, contains flags to signal the following conditions:
An active signal on the TCAP pin, transferring the contents of the timer registers to the input
capture registers
A match between the 16-bit counter and the output compare registers, transferring the OLVL bit to
the TCMP pin
A timer roll over from $FFFF to $0000
ICF — Input Capture Flag
The ICF bit is set automatically when an edge of the selected polarity occurs on the TCAP pin. Clear
the ICF bit by reading the timer status register with ICF set and then reading the low byte ($0015) of
the input capture registers. Resets have no effect on ICF.
OCF — Output Compare Flag
The OCF bit is set automatically when the value of the timer registers matches the contents of the
output compare registers. Clear the OCF bit by reading the timer status register with OCF set and then
reading the low byte ($0017) of the output compare registers. Resets have no effect on OCF.
TOF — Timer Overflow Flag
The TOF bit is set automatically when the 16-bit counter rolls over from $FFFF to $0000. Clear the
TOF bit by reading the timer status register with TOF set, and then reading the low byte ($0019) of the
timer registers. Resets have no effect on TOF.
$0013
Bit 7
654321
Bit 0
Read:
ICF
OCF
TOF
00000
Write:
Reset:
U
00000
= Unimplemented
U = Undetermined
Figure 8-3. Timer Status Register (TSR)
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