参数资料
型号: MC68HC908JL8MFAE
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP32
封装: PLASTIC, LQFP-32
文件页数: 22/56页
文件大小: 648K
代理商: MC68HC908JL8MFAE
MC68HC908JL8SM/D
Timer Interface Modules (TIM1 and TIM2)
MC68HC908JL8MC68HC908JK8
NOTE:
Setting the TSTOP and TRST bits simultaneously stops the TIM counter at a
value of $0000.
PS[2:0] — Prescaler Select Bits
TIM Counter
Registers
The two read-only TIM counter registers contain the high and low bytes of the
value in the TIM counter. Reading the high byte (TCNTH) latches the contents
of the low byte (TCNTL) into a buffer. Subsequent reads of TCNTH do not
affect the latched TCNTL value until TCNTL is read.
Table 6. Prescaler Selection
PS2
PS1
PS0
TIM Clock Source
0
Internal bus clock ÷ 1
0
1
Internal bus clock ÷ 2
0
1
0
Internal bus clock ÷ 4
0
1
Internal bus clock ÷ 8
1
0
Internal bus clock ÷ 16
1
0
1
Internal bus clock ÷ 32
1
0
Internal bus clock ÷ 64
1
T2CLK (for TIM2 only)
T1CNTH: $0021; T2CNTH: $0031
Bit 7
654321
Bit 0
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Reset:
00000000
T1CNTL: $0022; T2CNTL: $0032
Bit 7
654321
Bit 0
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Reset:
00000000
Figure 21. TIM Counter Registers (TCNTH:TCNTL)
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For More Information On This Product,
Go to: www.freescale.com
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