參數(shù)資料
型號: M34518M2-XXXFP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP32
封裝: 7 X 7 MM, 0.80 MM PITCH, PLASTIC, LQFP-32
文件頁數(shù): 44/157頁
文件大?。?/td> 1783K
代理商: M34518M2-XXXFP
ML610Q411/ML610Q412/ML610Q415 User’s Manual
Chapter 10
Timers
10 – 11
10.2.9
Timer 3 Counter Register (TM3C)
Address: 0F03DH
Access: R/W
Access size: 8 bits
Initial value: 00H
7
6
5
4
3
2
1
0
TM3C
T3C7
T3C6
T3C5
T3C4
T3C3
T3C2
T3C1
T3C0
R/W
Initial value
0
TM3C is a special function register (SFR) that functions as an 8-bit binary counter.
When write operation to TM3C is performed, TM3C is set to “00H”. The data that is written is meaningless.
In 16-bit timer mode and 16-bit timer frequency measurement mode, if write operation is performed to either the
low-order (TM2C) or high-order (TM3C), both the low order and the high order are set to “0000H”.
When reading TM3C in 16-bit timer mode, be sure to read TM2C first since the count value of TM3C is stored in the
TM3C latch when TM2C is read.
During timer operation, the contents of TM3C may not be read depending on the conditions of the timer clock and the
system clock.
Table 10-4 shows whether a TM3C read is enabled or disabled during timer operation for each condition of the timer
clock and system clock.
Table 10-4
TM3C Read Enable/Disable during Timer Operation
Timer clock
T3CK
System clock
SYSCLK
TM3C read enable/disable
LSCLK
Read enabled
LSCLK
HSCLK
Read enabled.
However, to prevent the reading of undefined
data during incremental counting, read TM3C twice and check
that the results match.
HTBCLK
LSCLK
Read disabled
HTBCLK
HSCLK
Read enabled
LSCLK
External clock
HSCLK
Read disabled
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M34518M2-XXXSP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
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