参数资料
型号: MC68HC11F1CPU4
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, EEPROM, 4 MHz, MICROCONTROLLER, PQFP80
封装: 14 X 14 MM, 1.40 MM HEIGHT, LQFP-80
文件页数: 19/162页
文件大小: 4554K
代理商: MC68HC11F1CPU4
TIMING SYSTEM
MOTOROLA
TECHNICAL DATA
9-9
OC1M[7:3] — Output Compare Masks
0 = OC1 is disabled.
1 = OC1 is enabled to control the corresponding pin of port A
Bits [2:0] — Not implemented
Always read zero
9.3.4 Output Compare Data Register
Use this register with OC1 to specify the data that is to be stored on the affected pin
of port A after a successful OC1 compare. When a successful OC1 compare occurs,
a data bit in OC1D is stored in the corresponding bit of port A for each bit that is set in
OC1M.
If OC1Mx is set, data in OC1Dx is output to port A bit x on successful OC1 compares.
Bits [2:0] — Not implemented
Always read zero
9.3.5 Timer Counter Register
The 16-bit read-only TCNT register contains the prescaled value of the 16-bit timer. A
full counter read addresses the most significant byte (MSB) first. A read of this address
causes the least significant byte (LSB) to be latched into a buffer for the next CPU cy-
cle so that a double-byte read returns the full 16-bit state of the counter at the time of
the MSB read cycle.
TCNT resets to $0000. In normal modes, TCNT is a read-only register.
9.3.6 Timer Control Register 1
The bits of this register specify the action taken as a result of a successful OCx com-
pare.
OC1M — Output Compare 1 Mask
$100C
Bit 7
654321
Bit 0
OC1M7
OC1M6
OC1M5
OC1M4
OC1M3
RESET:
0000000
0
OC1D — Output Compare 1 Data
$100D
Bit 7
654321
Bit 0
OC1D7
OC1D6
OC1D5
OC1D4
OC1D3
RESET:
0000000
0
TCNT — Timer Counter
$100E, $100F
$100E
Bit 15
14
13
12
11
10
9
Bit 8
TCNT (High)
$100F
Bit 7
654321
Bit 0
TCNT (Low)
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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